Diastereoselective Diels-Alder Reaction of 2-Thienyl and 2-Furyl Substituted 3-Propenethioamides with Electron Deficient Dienophiles
摘要:
The hetero-Diels-Alder reaction of N-aryl-3-(2-thienyl)-2-propenethioamides with N-phenylmaleimide and maleimide yielded a mixture of endo- and exo-2-arylimino-4-(2-thienyl)tetrahydrothiopyran[2,3-c]pyrroles. Cycloaddition to diethyl fumarate required acylation and furnished a mixture of diastereoisomeric 5-(N-acetylphenylamino)-2,3-bis-(ethoxycarbonyl)-4-(2-thienyl)-3,4-dihydro-2H-thiopyrans. Reactions of 3-(2-furyl)-2-propenethioamides with N-arylmaleimides furnished the correspondent 2-arylimino-4-(2-furyl)tetrahydrothiopyran[2,3-c]pyrroles. In the cycloadditions of the heterodienes with N-arylmaleimides the endo-cycloadducts were formed as the major products.
Inspired by recent transition-metal catalyzed electrophilic amidations, we developed a photo-induced electrophilic amidation of arylboronic acids with Fe catalyst to construct C−N bond. This protocol is also featured by its mild condition and broad substrate scope.
受最近过渡金属催化的亲电酰胺化的启发,我们开发了芳基硼酸与 Fe 催化剂的光诱导亲电酰胺化以构建 C-N 键。该协议还具有条件温和、底物范围广的特点。
Ikeda, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1955, vol. 75, p. 60
作者:Ikeda
DOI:——
日期:——
Nickel(0) induzierte und katalysierte CC-verknüpfungen zwischen phenylisocyanat und vinylsubstituierten heteroaromaten