Tetrahedron Letters p. 2743 - 2746 (1991)
Update date:2022-08-04
Topics:
Kuemmeil, Andreas
Seitz, Guenther
Dimethoxycarbene, generated from the norbornadienone ketal 6 or from triethyl orthoformate 12a can be trapped by various 1,2,4,5-tetrazines 1 to yield the corresponding isopyrazoles 10 in high yields via [4+1]-cycloaddition followed by [4+2]-cycloreversio
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