Internuclear cyclisation. Part XXIII. Formation and rearrangement of 2-methylisoindoline-1-spirocyclohexa-2′,5′-diene-3,4′-dione. Synthesis of the octahydro-derivative of an unsaturated dimer
作者:D. M. Collington、D. H. Hey、C. W. Rees
DOI:10.1039/j39680001017
日期:——
anilide-2-diazonium sulphate (VIII; O for S) decomposes in 18O-enriched water to give the dione (IV) with incorporation of 18O. This spiro-dienone forming reaction does not intervene in Pschorr cyclisations since trans-2-amino-α-(2- and 4-methoxyphenyl)cinnamic acids give 1- and 3-methoxyphenanthrene-10-carboxylic acid in high yield.
N-甲基-4'-(甲硫基)苯甲腈-2-重氮盐(VIII)的分解产生2-甲基异吲哚啉-1-螺环己基-2',5'-二烯-3,4'-二酮(IV)和甲硫醇,而不是相应的硫酮和甲醇。类似地,4'-甲氧基Ñ -methylbenzanilide -2-重氮硫酸盐(VIII; O代表S)中分解18 O型富集的水,得到二酮(IV)用的掺入18 O.此螺二烯酮形成反应不由于反式-2-氨基-α-(2-和4-甲氧基苯基)肉桂酸可高产率地生成1-和3-甲氧基菲-10-羧酸,因此可以干预Pschorr环化反应。