Reactions of 1-aryl- and 2,3-diaryl- 5-diazo-6,6-dimethyl-4-oxo-4,5,6,7-tetra- hydroindazoles with N-ethyl- and N-phenyl-substituted maleimides
作者:I. Strakova、M. Turks、E. Bizdena、S. Belyakov、A. Tokmakov、A. Strakovs
DOI:10.1007/s10593-009-0298-3
日期:2009.5
[3+2] Cyclocondensation reactions of a series of 1,3- and 2,3-disubstituted 5-diazo-6,6-dimethyl-4-oxo-4,5,6,7-tetrahydroindazoles with N-ethyl- and N-phenyl-substituted maleimides have been used to obtain the corresponding 6,6-dimethyl-4,4',6'-trioxo-4,5,6,7-3',3'a,4',5',6',6'a-decahydrospiro-[indazole-5,3'-pyrrolo[3,4-c]pyrazoles]. On boiling these compounds in toluene nitrogen is split off and they
[3 + 2]一系列1,3-和2,3-二取代的5-重氮-6,6-二甲基-4-氧代-4,5,6,7-四氢吲唑与N-乙基-和-的环缩合反应N-苯基取代的马来酰亚胺已用于获得相应的6,6-二甲基-4,4',6'-三氧代-4,5,6,7-3',3'a,4',5', 6',6'a-十氢螺-[吲唑-5,3'-吡咯并[3,4-c]吡唑]。将这些化合物在甲苯中煮沸时,会分离出氮,并将其转化为6',6'-二甲基-2,4,4'-三氧代-4',5',6',7'-四氢-1'H-螺[3-氮杂双环-(3.1.0)己烷-6,5'-吲唑]。