Substrate-Induced Diastereoselectivity in the Dimethyldioxirane Epoxidation of Simple Alkenes and Dienes
作者:Amalia Asouti、Lazaros P. Hadjiarapoglou
DOI:10.1055/s-2001-18751
日期:——
Various alkenes and dienes, such as (R)- or (S)-limonene 2, 2-carene 6, 3-carene 8, (R)-α-pinene 10, (S)-α-pinene 12, and endo-dicyclopentadiene 14 were transformed into the corresponding mono- and bis-epoxides by epoxidation with dimethyldioxirane (as an acetone solution). The selectivity observed in these epoxidations is explained by the assumption of hydrogen bonding between bridge protons and the dioxirane.
各种烯烃和二烯烃,例如(R)-或(S)-柠檬烯2、2-蒈烯6、3-蒈烯8、(R)-α-蒎烯10、(S)-α-蒎烯12以及endo-二环戊二烯14,通过二甲基二氧杂环丙烷(以丙酮溶液形式)的环氧化反应,被转化为相应的单环氧和双环氧化合物。在这些环氧化过程中观察到的选择性可以通过桥连质子与二氧杂环丙烷之间氢键的假设来解释。