Sequential [3,3]Sigmatropic Rearrangement: Regioselective Synthesis of Dimedone‐Annulated Heterocycles
作者:S. K. Samanta、K. C. Majumdar
DOI:10.1080/00397910500518924
日期:2006.5
Abstract The [3,3]sigmatropic rearrangement in the 3‐(4′‐aryloxybut‐2′‐ynyl)mercapto‐5,5‐dimethyl cyclohex‐2‐enones afforded a number of 4‐aryloxymethyl‐7,7‐dimethyl‐6,7,8‐trihydrothiochrom‐3‐en‐5‐ones (70–80%), which underwent second [3,3]sigmatropic rearrangement to furnish benzofuro[3,2‐c][1]‐2,3,4,6,6a,11a‐hexahydro‐3,3,11a‐trimethylthiobenzopyran‐2‐ones (60–70%).
摘要 3-(4'-芳氧基丁-2'-炔基)巯基-5,5-二甲基环己-2-烯酮中的[3,3]σ重排得到了许多4-芳氧基甲基-7,7-二甲基- 6,7,8-trihydrothiochrom-3-en-5-ones (70-80%),经过第二次 [3,3] σ 重排得到苯并呋喃 [3,2-c][1]-2,3, 4,6,6a,11a-六氢-3,3,11a-三甲硫基苯并吡喃-2-酮(60-70%)。