Hammet Constants Effects in Microwave Cascade Etherification-Cyclization-Krapcho Reaction to Access [2,3]-Dihydrobenzofuran-3-ones from Salicylic Derivatives
摘要:
Two methods were evaluated for the synthesis of substituted [2,3]-dihydro-2-methyl-benzofuran-3-ones from corresponding salicylate esters under microwave irradiation. A two-step sequence via ether intermediates was convenient for various substituted salicylate derivatives, while the second strategy involving a one-pot procedure was efficient for electron-donating substituted salicylates. Results allowed correlation of the Hammett constants effects in the intramolecular cyclization of O-ethoxycarbonyl ether of salicylic esters.
Synthesis of benzofuro[3,2-b]indoline amines via deamination-interrupted Fischer indolization and their unexpected reactivity towards nucleophiles
作者:Terry Tomakinian、Régis Guillot、Cyrille Kouklovsky、Guillaume Vincent
DOI:10.1039/c6cc00365f
日期:——
We report the access to the benzofuro[3,2-b]indoline framework via an interrupted Fischer indolization and its unexpected reactivity towards allyl nucleophiles.
我们报告通过中断的菲舍尔吲哚及其对烯丙基亲核试剂的意外反应性访问苯并呋喃[3,2- b ]二氢吲哚骨架。
Birch et al., Journal of the Chemical Society, 1936, p. 1834,1837
作者:Birch et al.
DOI:——
日期:——
CAGNIANT P.; KIRSCH G., C. R. ACAD. SCI <CHDC-AQ>, 1976, C 282, NO 21, 993-996