Journal of Organic Chemistry p. 3997 - 4000 (1987)
Update date:2022-08-04
Topics:
Taylor, Edward C.
Ray, Partha S.
Coupling of terminal acetylenes with 2-amino-3-cyano-5-bromopyrazine in the presence of catalytic amounts of palladium(II) salts and Cu(I) gave a series of 5-ethynyl derivatives which were cyclized with guanidine to 2,4-diamino-6-ethynyl-substituted pteri
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