Sc. Benson et al., INVERSE ELECTRON DEMAND DIELS-ALDER REACTIONS OF INDOLE .5. REACTIONSOF 3-SUBSTITUTED INDOLES WITH HETEROAROMATIC AZADIENES, Tetrahedron letters, 37(29), 1996, pp. 5061-5064
The inverse electron demand Diels-Alder reactions of 3-substituted ind
oles with 1,2,4-triazines and 1,2,4,5-tetrazines proceeded in excellen
t yields both inter- and intramolecularly. The cycloaddition of trypto
phan with a tethered 1,2,4-triazine produced a diastereomerically pure
cycloadduct. Copyright (C) 1996 Elsevier Science Ltd