跨环效应
kuà huán xiào yìng
- transannular effect
跨环效应-
研究了多种还原13位羰基的方法，最终借助5位羟基的跨环传递效应以NaBH4／MeOH／THF将13位羰基还原为13α羟基。
Reduction of 13-carbonyl group was studied . Finally reduction of 13-carbonyl group to 13 α - OH via 5-OH transannular delivery was achieved by NaBH_4 / MeOH / THF at 0 ℃ .
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研究了化合物1由于跨环共轭效应所引起的电子光谱的变化，并从溶剂效应及晶体结构进行了探讨。
Their solvent effect and structure of compound 1 are discussed .