A process for producing an epoxide represented by general formula (1a) or (1b), which comprises reacting an olefin represented by general formula (2) with a compound containing iodine and an acyloxy ion and treating the reaction product under a basic condition so as to form an oxirane ring on the stereochemically crowded side of the feed olefin. In formulae (1a), (1b) and (2), R¹, R², R³ and R⁴ represent each hydrogen, alkyl, alkenyl, aryl, alkoxy, aryloxy, acyl, alkoxycarbonyl, aryloxycarbonyl, aralkyl, silyl or silyloxy, provided that when each of these groups represents a divalent group, they may be combined together to represent a cyclic group, and that these groups may be the same or different from one another and further may be substituted or branched. The plane formed by the double bond, R¹, R², R³ and R⁴ has one side which is stereochemically more crowded than the other side.
一种生产通式(1a)或(1b)所代表的
环氧化物的工艺,包括将通式(2)所代表的烯烃与含有
碘和酰氧基离子的化合物反应,并在碱性条件下处理反应产物,以便在进料烯烃的立体
化学拥挤侧形成
环氧乙烷环。在式 (1a)、(1b) 和 (2) 中,R¹、R²、R³ 和 R⁴ 分别代表氢、烷基、烯基、芳基、烷氧基、芳氧基、酰基、烷氧基羰基、芳氧基羰基、芳烷基、
硅烷基或
硅氧基,条件是当这些基团中的每一个代表二价基团时,它们可以组合在一起代表一个环状基团,这些基团可以彼此相同或不同,并可进一步取代或支化。双键、R¹、R²、R³ 和 R⁴ 所形成的平面有一侧在立体
化学上比另一侧更密集。