A New Synthesis of Ciliapterin and Dictyopterin. Ene Reactions of (Alkenylamino)-nitroso-pyrimidines
作者:Fang-Li Zhang、Andrea Vasella
DOI:10.1002/hlca.200890255
日期:2008.12
A comparison of the reactivity of (acylamino)-nitroso-pyrimidines 1 and the alkenylamino analogue 17 in intramolecular enereactions showed the considerably lower reactivity of 17, leading to the pteridine 18. Pteridin-7-one 11 resulting from 1 (R1=OBn, R2=Me) was transformed into 4-(benzyloxy)-6-[(E)-prop-1-enyl]pteridin-2-amine (13) by O-triflation, followed by reduction with LiBHEt3, while the 4-MeO