Transition metal complexes of diazenes XXXIX stilbenylazobenzene derivatives by cobalt-catalysed addition of diphenylacetylene to 1,2-diaryldiazenes and their acid-catalysed rearrangement to N-anilinoindoles
作者:U. Dürr、F.W. Heinemann、H. Kisch
DOI:10.1016/s0022-328x(97)00074-0
日期:1997.8
the substituted phenyl ring is attacked. The structure of 2-(trans-stilbenyl)-3,5-dichloroazobenzene was determined by single crystal X-ray analysis. Depending on the substitution pattern the stilbenyl derivatives may isomerize to 2,3-dihydrocinnolines. These 1:1 adducts are identified as the intermediates previously postulated in the rhodium-catalysed synthesis of N-anilinoindoles fromalkynes and
We examined the Pd-catalyzed heteroannulation of 2-haloamines with internal alkynes under phosphine-free conditions. The thiopseudourea palladium(II) complex (5) found to be an efficient catalyst for the Pd induced heteroannulation. Achieved high turnover number for the heteroannulation reactions of internal alkynes with 2-iodoaniline. A variety of 2-bromoanilines and N-tosyl substituted 2-bromoanilines