Polycyclic 2H-Pyran Derivatives by Intramolecular Hetero-Diels-Alder Reactionsof a-Sulfur-Substituted a,b-UnsaturatedCarbonyl Compounds
作者:Krystyna Bogdanowicz-Szwed、Aleksandra Pałasz
DOI:10.1007/s007060170125
日期:2001.3.15
Reaction of 1-(phenylsulfenyl)-, 1-(phenylsulfinyl)-, and 1-(phenylsulfonyl)-2- propanones as well as 2-(phenylsulfonyl)-acetophenone with 2-(3-methyl-2-butenyloxy)- and 2-(( E )-3-phenyl-2-propenyloxy)-benzaldehydes yielded the corresponding Knoevenagel condensation products. The latter compounds underwent intramolecular cycloadditions affording cis -fused 2 H -pyran derivatives as the major products
1-(苯磺酰基)-,1-(苯磺酰基)-和1-(苯磺酰基)-2-丙烷以及2-(苯磺酰基)-苯乙酮与2-(3-甲基-2-丁烯氧基)-和2-(( E )-3-苯基-2-丙烯氧基)-苯甲醛产生相应的 Knoevenagel 缩合产物。后面的化合物进行分子内环加成反应,得到以 顺式 融合的2 H- 吡喃衍生物为主要产物。