benzylic造句
例句与造句
- Next, the carbanion resulting from the benzylic hydrogen extraction performs a nucleophilic attack on the electrophilic carbonyl carbon of the amide group.
- Common methods for generating o-quinodimethanes include pyrolysis of benzocyclobutenes or stannanes, and reduction of ?, ?-ortho benzylic dibromides.
- Even an alkyl group ( with a benzylic hydrogen ) on an aromatic ring is oxidized, e . g . toluene to benzoic acid.
- Primary, secondary, and benzylic alcohols, also successfully react with nitriles in the presence of strong acids to form amides via the Ritter reaction.
- In fact, the sign of the charge and degree to which it develops will be affected by the substituent in the case of the benzylic system.
- It's difficult to find benzylic in a sentence. 用benzylic造句挺难的
- Heteroatom-containing substituents may direct metalation to the benzylic site closest to the heteroatom or increase the acidity of the ring carbons via an inductive effect.
- Oxidative halogenation can be promoted by CAN as an " in situ " oxidant for benzylic bromination, and the iodination of ketones and uracil derivatives.
- In order to achieve high levels of regioselectivity, this reactivity has been explored mainly for styrenes, which are biased towards formation of the benzylic radical intermediate.
- Treatment of that product with triethyl silane then reduces the ring unsaturation and cleaves the benzylic nitrogen bond on the auxiliary to yield as the optically pure trans isomer.
- Complexation of an aromatic ring to chromium stabilizes both anions and cations at the benzylic position and provides a steric blocking element for diastereoselective functionalization of the benzylic position.
- Complexation of an aromatic ring to chromium stabilizes both anions and cations at the benzylic position and provides a steric blocking element for diastereoselective functionalization of the benzylic position.
- "' Heteroatom-promoted lateral lithiation "'is the site-selective replacement of a benzylic hydrogen atom for lithium for the purpose of further functionalization.
- The proposed tetracoordinate aluminum prevent the imide acting as a chelating Lewis base, while enhance the ?-vinyl proton of the dienphile and the benzylic proton of the catalyst.
- Benzofuranone is another most effective antioxidant, which terminates the chain reaction by donating weakly bonded benzylic hydrogen atom and gets reduced to a stable benzofuranyl ( lactone ) [ 1 ].
- In fact, Corey & ndash; Kim conditions with no addition of triethylamine are very efficient for the transformation of allylic and benzylic alcohols to chlorides in presence of other alcohols.
