Biphenylenes. Part XXVII. Synthesis of compounds derived from 2-acetylbiphenylene
作者:D. V. Gardner、J. F. W. McOmie、T. P. Prabhu
DOI:10.1039/j39700002500
日期:——
lene; some transformations of these compounds are described. Friedel–Crafts acetylation of 2-methylbiphenylene gave mainly the 3-acetyl and 3,7-diacetyl derivatives. Friedel–Crafts acylation of biphenylene with ethoxalyl chloride could be made to give either the 2-glyoxylic ester or a mixture of the mono ester and the 2,6-diglyoxylic ester. Appropriate reduction of biphenylene-2-glyoxylic acid gave
温和还原2-乙酰基联苯,然后脱水,得到2-乙烯基联苯。用五氯化磷处理2-乙酰基联苯得到2-氯乙酰基和顺式-二氯乙烯基联苯;描述了这些化合物的一些转化。2-甲基联苯的Friedel-Crafts乙酰化反应主要产生3-乙酰基和3,7-二乙酰基衍生物。可以进行联苯与乙二酰氯的Friedel-Crafts酰化反应,得到2-乙醛酸酯或单酸酯和2,6-二乙醛酸酯的混合物。适当还原联苯-2-乙醛酸得到乙酸和α-羟基乙酸。