The products derived from the acid-catalyzed dehydration of 4-hydroxy-2,3,4-triphenyl-2-cyclopentenone
作者:M.K. Conner、J.M. Dunston、E. LeGoff、P. Yates
DOI:10.1016/s0040-4020(01)98214-6
日期:1971.1
Acid-catalyzed dehydration of 4-hydroxy-2,3,4-triphenyl-2-cyclopentenone (1) affords a mixture of dimers and a dehydrodimer of 2,3,4-triphenylcyclopentadienone (2). The structures of three of these dimers have been established as 2,3-dihydro-3,3′, 4,4′, 5,5′-hexaphenyl-2,2′-bis(cyclopentadienone) (3), (E)-3,3′, 4,4′, 5,5′-hexaphenyl[bi-3-cyclopentenylidene]-2,2′-dione (5), and 3a,3b,6a,10b-tetrahydro-1
4-羟基-2,3,4-三苯基-2-环戊烯酮(的酸催化脱水1),得到二聚物的混合物和2,3,4- triphenylcyclopentadienone(的dehydrodimer 2)。这些三聚体中的三个的结构已确定为2,3-二氢-3,3',4,4',5,5'-六苯基-2,2'-双(环戊二烯酮)(3)(E) -3,3',4,4',5,5'-六苯基[bi-3-cyclopentenylidene] -2,2'-dione(5)和3a,3b,6a,10b-tetrahydro-1,2,5,6-,6a-五苯基苯[ e ]-为-茚并三-3,4-二酮(11)。脱氢二聚体的结构已确定为4-羟基-1,2,5,6,6a-五苯基苯并[ e ]-为-indacen-3(6a)H一(14)。5用氯乙腈脱氢得到3,3',4,4',5,5'-六苯基-2,2'-双(环戊二烯酮)(7),在热重排时得到14。