Investigations on the Reactions of a Carbonylcarbene with Substituted 1,3-Dioxepins
作者:Naciye Talinli、Bekir Karligˇa、Olcay Anaç
DOI:10.1002/(sici)1522-2675(20000510)83:5<966::aid-hlca966>3.0.co;2-y
日期:2000.5.10
Several dioxepins were treated with dimethyl diazomalonate under bis(acetylacetonato)copper(II) catalysis. The 4,7-dihydro-2-methyl-1,3-dioxepin (1a) gave oxonium ylide originated products and a cyclopropane derivative (see 3a and 2a. resp.. in Scheme 3b). However, the 2,2-dimethyl derivative 1b of 1,3-dioxepin yielded only the cyclopropanation product 2b, (Scheme 3.b), whereas 4,5-dihydro-2-methyl-1,3-dioxepin (9) gave the furanofuran derivative 10 (Scheme 4).