Acylation and alkylation reactions. Part V. Some syntheses of tricyclic derivatives of benzo[b]furan-3(2H)-one
作者:M. H. Palmer、N. M. Scollick
DOI:10.1039/j39680002836
日期:——
The synthesis of 5,6,7,8-tetrahydronaphtho[2,3-b]furan-3(2H)-one (2; n= 4), 6,7,8,9-tetrahydro-5H-cyclohepta[4,5]benzo[1,2-b]furan-3(2H)-one (2; n= 5), and 7,8,9,10-tetrahydro-6H-cyclohepta[3,4]benzo[1,2-b]-furan-1 (2H)-one (3; n= 5) is described. Selective hydrolysis, selective transesterification, and selective esterification of the intermediate 1,3-dicarboxy-derivatives of 5,6,7,8-tetrahydro-2-naphthol
5,6,7,8-四氢萘并[2,3-的合成b ]呋喃-3-(2 ħ) -酮(2; Ñ = 4),6,7,8,9-四氢-5- ħ -环庚[4,5]苯并[1,2 - b ]呋喃-3(2 H)-one(2; n = 5)和7,8,9,10-四氢-6 H-环庚[3,4]苯并[1,2 - b ]-呋喃-1(2 H)-一(3; n= 5)。发生5,6,7,8-四氢-2-萘酚的中间体1,3-二羧基衍生物及其同系物的选择性水解,选择性酯交换和选择性酯化。在1,3-二乙氧基羰基-5,6,7,8-四氢-2-萘氧基乙酸酯和1,3-二乙氧基羰基-6,7,8,9-四氢-5 H-苯并环庚-2-基氧基乙酸酯上的Dieckmann反应( 20; n = 4和5)得到角羟基酯(22; n = 4和5)。