作者:C.W. Bird、A.L. Bronw、C.C. Chan
DOI:10.1016/s0040-4020(01)82364-4
日期:1985.1
The treatment of l, 2, 3, 4, 4a, 9b-hexahydro-3, 8-dihydroxy-7-methoxy-9b-(2'-methoxyethyl)dibenzofuran with chloroform and aqueous potassium hydroxide under conventional Reimer-Tiemann reaction conditions resulted in the replacement of the 7-methoxyl group by a carbaldehyde one. A choice between alternative pathways for this novel displacement has been facilitated by examination of the behaviour of
在常规Reimer-Tiemann反应条件下,用氯仿和氢氧化钾水溶液处理1、2、3、4、4a,9b-六氢-3、8-二羟基-7-甲氧基-9b-(2'-甲氧基乙基)二苯并呋喃在用甲醛取代7-甲氧基的过程中。通过检查相应的7-三氟甲氧基甲氧基化合物的行为,已经为这种新颖的置换选择了其他途径。二氯卡宾在位置7而不是在未取代的位置9的进攻表明是由于后者位点的空间负担。