Zur Umsetzung von 3,4-Dihydro-8a-methoxy-2H-1,4-benzoxazin-6(8aH)-onen mit Diazoalkanen, 1. Mitt.
作者:Manfred Schubert-Zsilavecz
DOI:10.1007/bf00815165
日期:——
3,4-Dihydro-8a-methoxy-2H-1,4-benzoxazin-6(8a')-ones - quinol derivatives of 2-hydroxyethylamino-1, 4-benzoquinones - react with diazoalkanes to yield 2,3,9a,9b-Tetrahydro-9H-pyrazolo[3,4-h]-1, 4-benzoxazin-6(6 aH)-ones (3). Their structures were established on basis of NMR-techniques including two-dimensional experiments. The orientation phenomena of the reaction is discussed.