Studies in photochemistry. Part VII. The photocyclisation of some nuclear-substituted stilbenes to substituted phenanthrenes
作者:E. V. Blackburn、C. E. Loader、C. J. Timmons
DOI:10.1039/j39680001576
日期:——
Photocyclodehydrogenation of trans-9-styryl-1,2,3,4,5,6,7,8-octahydroanthracene in cyclohexane solution formed a mixture of 11-butyl- and 11-but-3-enyl-1,2,3,4-tetrahydrochrysene in very small yield, identified by their i.r., u.v., 1H n.m.r., and mass spectra. 2,4,6-Trimethylstilbene photocyclised to 1,3-dimethylphenanthrene with the elimination of a methyl group. 3,3′,5,5′-Tetramethylstilbene formed
在环己烷溶液中反式-9-苯乙烯基-1,2,3,4,5,6,7,8-八氢蒽的光环脱氢反应形成11-丁基-和11-丁-3-烯基-1,2,3的混合物通过其ir,uv,1 H nmr和质谱鉴定的1,4-四氢丙烯收率非常低。2,4,6-三甲基sti光环化为1,3-二甲基菲并消除了甲基。当在环己烷溶液中照射时,3,3',5,5'-四甲基sti形成了2,4,5,7-四甲基菲。类似地,4,4′-二溴-和4,4′-二氰基-sti形成相应的3,6-二取代的菲。