Unusual Tandem Oxidative C–C Bond Cleavage and Acetalization of Chalcone Epoxides in the Presence of Iodine in Methanol
作者:Shriniwas Samant、Balaso Jadhav
DOI:10.1055/s-0033-1339134
日期:——
of chalcone epoxides is observed where chalcone epoxides on heating with iodine in methanol leads to α,α-dimethoxyacetophenones, through C–C bond cleavage followed by acetalization of the formyl group. The process occurs through ring opening of the chalcone epoxide by methanol to form β-methoxy alcohol, cleavage of the C–C bond in the latter to form α-ketoaldehyde, and acetalization of the formyl group
观察到查尔酮环氧化物的不寻常反应,其中查尔酮环氧化物与甲醇中的碘一起加热,通过 C-C 键断裂,然后甲酰基的缩醛化,生成 α,α-二甲氧基苯乙酮。该过程是通过甲醇使查耳酮环氧化物开环形成β-甲氧基醇,后者中的C-C键断裂形成α-酮醛,以及甲酰基的缩醛化得到产物。该协议提供了从查尔酮环氧化物中直接获取 α,α-二甲氧基苯乙酮的途径。