作者:Franco Gatta、Guido Settimj
DOI:10.1002/jhet.5570200524
日期:1983.9
Chromium trioxide oxidation of 1-phenylisochroman-4-spiro-1′-cyclopentane (Ia) in acetic acid led to the expected 1-(2-benzoylphenyl)cyclopentanecarboxylic acid (IIa), while its 6,7-dimethoxy analogue Ib and 6,7-dimethoxy-1-phenylisochroman-4-spiro-4′-(1′-methyl)piperidine (Ic) under the same conditions gave a mixture of their related 1-hydroxy derivatives VIIIb and VIIIc and of the p-benzoquinones
1-苯基异chroman-4-spiro-1'-环戊烷(Ia)在乙酸中的三氧化铬氧化可生成预期的1-(2-苯甲酰基苯基)环戊烷羧酸(IIa),而其6,7-二甲氧基类似物Ib和6在相同条件下,7,2-二甲氧基-1-苯基异色满-4-螺-4'-(1'-甲基)哌啶(Ic)给出了其相关的1-羟基衍生物VIIIb和VIIIc和对-苯醌的混合物, 1-苯甲酰氧基甲基-1-(2,5-二氧代-4-甲氧基苯基)环戊烷(IXb)和1-苯甲酰氧基甲基-1-(2,5-二氧代-4-甲氧基苯基)-1-甲基哌啶(IXc)。用肼或一甲基肼将IIa环化,产生5-螺取代的1-苯基-3,5-二氢-4 H -2,3-苯并二氮杂-4-酮IIIa或XIa。