Journal of Organic Chemistry p. 4920 - 4924 (1986)
Update date:2022-08-02
Topics:
Dirlam, John P.
Clark, David A.
Hecker, Scott J.
A convergent total synthesis of the antibiotic (+/-)-indolmycin (1) is presented.N-Carbobenzoxy-3-(1-chloroethyl)indole (12) is prepared in three steps from indole-3-carboxaldehyde (9).Alkylation of the lithium anion of 2-(dimethylamino)-4(5H)-oxazolone (4) with chloride (12) provides a mixture of the (+/-)-2-dimethylamino derivative of indolmycin (13) and its diastereomer (14) in a ratio of 2.2:1.Amine exchange is effected by treatment of 13 with methylamine, affording (+/-)-1 in five steps from commercially available 9.Efforts to extend this technology toward an asymmetric synthesis of (-)-1 are described.
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