#Nhpi

Смотрите Reels видео о Nhpi от людей со всего мира.

Смотрите анонимно без входа.

Трендовые Reels

(8)
#Nhpi Reel by @organic_reaction_hub - "The reaction of a ketone (most often a cyclic one) with an α,β-unsaturated ketone to give a substituted cyclohexenone derivative is known as the Robi
180
OR
@organic_reaction_hub
“The reaction of a ketone (most often a cyclic one) with an α,β-unsaturated ketone to give a substituted cyclohexenone derivative is known as the Robinson annulation.“ Features of the reaction: Combination of three reactions: Michael addition, intramolecular aldol reaction, and dehydration. Methyl vinyl ketone (MVK) and its various derivatives use as enone component; one-pot process, but yields tend to be higher when Michael adduct is isolated and then aldol reaction. Regioselective cyclization can also be achieved by using pre-formed enolates or enamines. Mechanism: Robinson annulation has three distinct steps: the Michael addition of the enol or enolate across the double bond of the α,β-unsaturated ketone to produce a 1,5-diketone (Michael adduct), followed by an intramolecular aldol reaction, which affords a cyclic β-hydroxy ketone (keto alcohol), and finally a base-catalyzed dehydration which gives rise to the substituted cyclohexenone. #organicsynthesis #organicchemistrylearning #drughunting #organicchemistry
#Nhpi Reel by @ochemdecoded - A great NMR practice problem with proton and carbon. I feel like I wrote the degree of unsaturation wrong when I made this one but still got the degre
2.3K
OC
@ochemdecoded
A great NMR practice problem with proton and carbon. I feel like I wrote the degree of unsaturation wrong when I made this one but still got the degrees right lol #organicchemistry #ochem #premed #organicchemistrytutor #stem
#Nhpi Reel by @organic_reaction_hub - "The conversion of a carboxylic acid to its homolog (one CH2 group longer) in three stages is called the Arndt-Eistert synthesis" This homologation i
191
OR
@organic_reaction_hub
“The conversion of a carboxylic acid to its homolog (one CH2 group longer) in three stages is called the Arndt-Eistert synthesis” This homologation is the best preparative method for the chain elongation of carboxylic acids. In the first step: Acid is converted to the corresponding acid chloride. The second step: Formation of a α-diazo methylketone, followed by a Wolff rearrangement then conducted either in the presence of solid silver oxide/water or silver benzoate. *If the reaction is conducted in the presence of an alcohol (ROH) or amine (RNHR’), corresponding homologated ester or amide form. *Alternative method is to heat the diazo ketone in the presence of a nucleophilic solvent (H2O, ROH, or RNH2). Mechanism: First step to form acid chloride using SOCl2 then diazomethane attack on acid chloride, elimination of chloride and α-diazo methylketone formation followed by Wolff rearrangement afford homologated product. #organicsynthesis #organicchemistrylearning #drughunting #drugdiscovery
#Nhpi Reel by @searchnsucceed - pH vs pI titration curves reveal how amino acids behave during protonation and deprotonation. Alanine shows a simple curve, glutamate adds an extra ac
219
SE
@searchnsucceed
pH vs pI titration curves reveal how amino acids behave during protonation and deprotonation. Alanine shows a simple curve, glutamate adds an extra acidic group, and histidine reveals the buffering power of the imidazole ring. Understanding these curves is key for biochemistry exams. Follow @searchnsucceed #Biochemistry #AminoAcids #CSIRNET #KSET #LifeSciences ProteinChemistry
#Nhpi Reel by @shenghe_chemical - 4'-Methoxypropiophenone （CAS No：121-97-1）#ShengheChemical #ChemSP #圣和化工厂家 #Chemicals #Chemical
139
SH
@shenghe_chemical
4'-Methoxypropiophenone （CAS No：121-97-1）#ShengheChemical #ChemSP #圣和化工厂家 #Chemicals #Chemical
#Nhpi Reel by @organic_reaction_hub - "The photochemical cycloaddition between aldehydes and alkenes to form oxetanes is known as the Paterno-Büchi reaction" In 1909, E. Paterno and G. Ch
167
OR
@organic_reaction_hub
“The photochemical cycloaddition between aldehydes and alkenes to form oxetanes is known as the Paterno-Büchi reaction” In 1909, E. Paterno and G. Chieffi reported an interesting reaction that took place between benzaldehyde and 2-methyl-2-butene upon exposure to sunlight. Carbonyl substrate (aldehyde or a ketone) is the energy-absorbing component, excited upon irradiation and alkene substrate, most often with electron-donating substituents (e.g., alkoxy, thioalkyl, or alkylamino). Selectivity: Highly regio- and stereoselective, and the regiochemical via stable 1,4-biradical intermediate. Mechanism: Carbonyl functionality (S0) excite by UV photon via n * -absorption to afford singlet state (S1); the S1 convert to the carbonyl triplet state (T1) via intersystem crossing (ISC); react with alkene (very high concentration) via photocycloaddition in stereospecific afford to oxetane product. #organicsynthesis #organicchemistrylearning #drughunting #drugdiscovery #organicchemistry
#Nhpi Reel by @organic_reaction_hub - "In 1883, H. von Pechmann and C. Duisberg reported that when ethyl acetoacetate was mixed with resorcinol in presence of concentrated sulfuric acid, 4
165
OR
@organic_reaction_hub
“In 1883, H. von Pechmann and C. Duisberg reported that when ethyl acetoacetate was mixed with resorcinol in presence of concentrated sulfuric acid, 4-methyl-7-hydroxycoumarin was formed” “The condensation of phenols with β-keto esters in the presence of protic or Lewis acids to afford substituted coumarins is known as von Pechmann reaction (also as Pechmann reaction or Pechmann condensation)” Features: * Best substrates are electron-rich mono-, di-, and trihydric phenols having electron-donating substituents, * Phenols with strongly electron-withdrawing substituents (e.g., NO2 or CO2H) often fail to react. * β-keto esters yield coumarins that have substituents at C4 position while malic acid affords coumarins which are unsubstituted at C4. * For highly reactive phenols, heating is not necessary, but for less reactive substrates heating is often required. Mechanism: Phenol attack on enol form of β-keto ester (SEAr). Aromatization then condensation followed by annulation and Elimination of EtOH afford Substituted coumarin. #organicsynthesis #organicchemistrylearning #drughunting #drugdiscovery #organicchemistry
#Nhpi Reel by @organic_reaction_hub - "In 1972, M. Kumada and R.J.P. Corriu independently discovered the stereoselective cross-coupling reaction between aryl- or alkenyl halides and Grigna
173
OR
@organic_reaction_hub
“In 1972, M. Kumada and R.J.P. Corriu independently discovered the stereoselective cross-coupling reaction between aryl- or alkenyl halides and Grignard reagents in the presence of a catalytic amount of a nickel-phosphine complex. This transformation is now referred to as the Kumada cross-coupling” Nickel catalysis only worked for Grignard reagents and excluded the highly versatile organolithium reagents. Features : * Ni-catalyzed process the catalytic activity depends largely on the nature of the phosphine ligand and catalysts. Reactivity trend : Ni(dppp)Cl2 > Ni(dppe)Cl2 > Ni(PR3)2Cl2 ~ Ni(dppb)Cl2. * Alkyl (sp3) Grignard reagents having β-hydrogens can selectively undergo cross-coupling reactions without any undesired β-hydride elimination. * Chlorinated aromatic compounds react with ease and even fluorobenzene can undergo Ni- catalyzed cross-coupling. * Pd-catalyzed process is more chemo- and stereoselective and has a much broader scope with carbanions than the Ni-catalyzed reaction. * Coupling does not take place with aryl chlorides, only with aryl bromides and iodides. Mostly use Organomagnesium and organolithium reagents, also used organosodium (RNa), organocopper (R2CuLi), organoaluminum, organozinc, organotin, organozirconium, and organoboron. Mechanism: First oxidative addition (transmetallation first for Ni catalyst) then again transmetallation and co-ordination and last step reductive elimination. #organicsynthesis #organicchemistrylearning #drughunting #drugdiscovery #organicchemitry

✨ Руководство по #Nhpi

Instagram содержит thousands of публикаций под #Nhpi, создавая одну из самых ярких визуальных экосистем платформы.

#Nhpi — один из самых популярных трендов в Instagram прямо сейчас. С более чем thousands of публикаций в этой категории, создатели вроде @ochemdecoded, @searchnsucceed and @organic_reaction_hub лидируют со своим вирусным контентом. Просматривайте эти популярные видео анонимно на Pictame.

Что в тренде в #Nhpi? Самые просматриваемые видео Reels и вирусный контент представлены выше.

Популярные Категории

📹 Видео-тренды: Откройте для себя последние Reels и вирусные видео

📈 Стратегия хэштегов: Изучите трендовые варианты хэштегов для вашего контента

🌟 Избранные Создатели: @ochemdecoded, @searchnsucceed, @organic_reaction_hub и другие ведут сообщество

Часто задаваемые вопросы о #Nhpi

С помощью Pictame вы можете просматривать все реелы и видео #Nhpi без входа в Instagram. Учетная запись не требуется, ваша активность остается приватной.

Анализ Эффективности

Анализ 8 роликов

✅ Умеренная Конкуренция

💡 Лучшие посты получают в среднем 917.3333333333334 просмотров (в 2.1x раз выше среднего)

Публикуйте регулярно 3-5 раз/неделю в активные часы

Советы по Созданию Контента и Стратегия

💡 Лучший контент получает сотни просмотров - сосредоточьтесь на первых 3 секундах

✍️ Подробные подписи с историей работают хорошо - средняя длина 803 символов

📹 Вертикальные видео высокого качества (9:16) лучше всего работают для #Nhpi - используйте хорошее освещение и четкий звук

Популярные поиски по #Nhpi

🎬Для Любителей Видео

Nhpi ReelsСмотреть Nhpi Видео

📈Для Ищущих Стратегию

Nhpi Трендовые ХэштегиЛучшие Nhpi Хэштеги

🌟Исследовать Больше

Исследовать Nhpi