The first and efficient synthesis of the new purinium natural product Heteromine A, involving 5-amino-4-cyano-1-methylimidazole and N,N-dimethyldichlomethyleniminium chloride is reported. (C) 1997 Eisevier Science Ltd.
The first and efficient synthesis of the new purinium natural product Heteromine A, involving 5-amino-4-cyano-1-methylimidazole and N,N-dimethyldichlomethyleniminium chloride is reported. (C) 1997 Eisevier Science Ltd.
Efficient total syntheses of heteromines A and B (antitumor compounds previously isolated from the plant Heterostemma brownii Hayata) from commercially available 2-amino-6-chloropurine have been developed. The synthesis of heteromine A is considerably shorter than the previously reported synthesis, only requiring foursteps, whereas the iodide salt of heteromine B was prepared in fivesteps. Heteromines