Asymmetric Diels-Alder Reaction of 2-(p-Tolylsulfinyl)-1-indolyl a,b-Unsaturated Enones
作者:Yoshitsugu Arai、Takeshi Katori、Yukio Masaki
DOI:10.3987/com-06-10695
日期:——
The asymmetric Diels-Alder reaction of chiral l-[2-(p-tolylsulfinyl)-indolyl enones was examined. The cycloaddition of cinnamyl and crotonyl α,β-unsaturated enones with cyclopentadiene in the presence of a lanthanoid triflate as a Lewisacid proceeds smoothly to give the corresponding endo cycloadducts with high diastereoselectivity.
Synthesis of Chiral Sulfinyl-Substituted 1-Indolyl Enones and Asymmetric Conjugate Addition by an Arylcopper Reagent
作者:Yoshitsugu Arai、Makoto Kasai、Yukio Masaki
DOI:10.1248/cpb.52.733
日期:——
The asymmetricconjugateaddition of arylcopper reagents to chiral 1-[2-(p-tolylsulfinyl)]indolyl and 1-[3-(p-tolylsulfinyl)]indolyl enones was examined. With the 2-sulfinyl-indolyl derivatives, the reaction of the arylcopper reagent gave high diastereoselectivities (81-88% de's) to afford the adducts in excellent yields, although the similar addition reaction of the 3-sulfinyl derivatives afforded