Synthetic transformations of methylenelactones of eudesmanic type. Behavior of isoalantolactone under the conitions of heck reaction
作者:A. V. Belovodskii、E. E. Shults、M. M. Shakirov、I. Yu. Bagryanskaya、Yu. V. Gatilov、G. A. Tolstikov
DOI:10.1134/s1070428010110199
日期:2010.11
By Heck reaction of isoalantolactone with aryl bromides or aryl iodides (3aR,4aS,8aR,9aR,E)-3-arylmethylidene-8a-methyl-5-methylidenedecahydronaphtho[2,3-b]furan-2(3H)-ones and (4aS,8aR,9aS)-3-arylmethyl-8a-methyl-5-methylidene-4a,5,6,7,8,8a,9,9a-octahydronaphtho[2,3-b]furan-2(4H)-ones, products of the double bond shift, were synthesized. The yields of the arylation products depend on the nature of the catalytic system and on the structure of the aryl halide. The structures of(3aR,4aS,8aR,9aR,E)-3-(3,4-dimethoxybenzylidene)-8a-methyl-5-methylidenedecahydronaphtho[2,3-b] furan-2(3H)-one and (4aS,8aR,9aS)-3-(2-methylsulfanylbenzyl)-8a-methyl-5-methylidene-4a,5,6,7,8,8a,9,9a-octahydronaphtho[2,3-b]furan-2(4H)-one were proved by XRD analysis.