Studies on the N-oxides of .PI.-deficient N-heteroaromatics. XXXIV. A novel synthesis of substituted indoles by photochemical ring contraction of 3,1-benzoxazepines.
Studies on the N-oxides of .PI.-deficient N-heteroaromatics. XXXIV. A novel synthesis of substituted indoles by photochemical ring contraction of 3,1-benzoxazepines.
Grapheneoxide was found to be a highly efficient and cost-effective heterogeneous catalyst for the direct metal-free transformation of quinoline and isoquinoline N-oxides into the corresponding nitriles under mild conditions. This method is simple, economic and environmentally benign, representing a useful strategy for the convenient synthesis of α-cyano N-oxides that are difficult to prepare by