γ-Diphenylphosphinoxy Carbanions: Slow Reacting Analogues of γ -Halocarbanions
摘要:
Carbanion of diphenylphosphinyl ester of 3-hydroxypropyl phenyl sulfone undergoes slow 1,3-intramolecular nucleophilic substitution to give substituted cyclopropane. It can be efficiently trapped by external electrophiles such as aldehydes to produce aldol type anions, which undergo 1,5-intramolecular substitution to give substituted tetrahydrofurans.
γ-Diphenylphosphinoxy Carbanions: Slow Reacting Analogues of γ -Halocarbanions
摘要:
Carbanion of diphenylphosphinyl ester of 3-hydroxypropyl phenyl sulfone undergoes slow 1,3-intramolecular nucleophilic substitution to give substituted cyclopropane. It can be efficiently trapped by external electrophiles such as aldehydes to produce aldol type anions, which undergo 1,5-intramolecular substitution to give substituted tetrahydrofurans.