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
摘要:
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.