A regioselective [3 + 2] cycloaddition reaction of 2-benzylidene-1-indenones with functional olefins to access indanone-fused 2D/3D skeletons
作者:Yi-Hang Deng、Chuan-Bao Zhang、Jun-Jie Sun、Wen-Li Xu、Ji-Ya Fu
DOI:10.1039/d3ob00559c
日期:——
The regioselective [3 + 2] cycloadditionreaction of 2-benzylidene-1-indenones with functional olefins was established with DABCO as a base under mild conditions. Using this approach, a series of diversely substituted indanone-fused cyclopentane polycycles with highly crowded multiple substituents were synthesized in high yields.
Reaction of methyl 1-bromocyclopentane- and 1-bromocyclohexanecarboxylates with zinc and 2-arylmethylidene-2,3-dihydro-1H-inden-1-ones or 2-arylmethylidene-3,4-dihydronaphthalen-1(2H)-ones
作者:N. F. Kirillov、A. G. Gavrilov、M. I. Vakhrin
DOI:10.1134/s1070428012030050
日期:2012.3
Methyl 1-bromocyclopentanecarboxylate and methyl 1-bromocyclohexanecarboxylate reacted with zinc and 2-arylmethylidene-2,3-dihydro-1H-inden-1-ones or 2-arylmethylidene-3,4-dihydronaphthalen-1(2H)-ones to give 4'-aryl-4', 5'-dihydro-2'H-spiro[cyclopentane(cyclohexane)-1,3'-indeno[1,2-b]pyran]-2'-ones or 4-aryl-5,6-dihydrospiro[benzo[h]chromene-3,1'-cyclopentane(cyclohexane)]-2(4H)-ones, respectively.