those with condensed aromatic moieties, are readily vinylated with arylacetylenes (KOH/DMSO, 100 °C, 1 h) to give regio‐ and stereoselectively the (E)‐β‐γ‐ethylenic ketones ((E)‐3‐buten‐1‐ones) in 61–84 % yields and with approximately 100 % stereoselectivity. This vinylation represents a new C(sp3)C(sp2) bond‐forming reaction of high synthetic potential.
烷基芳基和alkylheteroarylketones,包括那些具有稠合芳族结构部分,可容易地用arylacetylenes(KOH /
DMSO,100℃,1个小时),得到区域选择性和立体选择性的(
乙烯基化ë)- β-γ烯酮((ë) -3-
丁烯-1-酮)的产率为61-84%,立体选择性约为100%。这种
乙烯基化代表了高合成潜力的新的C(sp 3)C(sp 2)键形成反应。