Toyooka N, Zhou D, Nemoto H, Tezuka Y, Kadota S, Andriamaharavo NR, Garraffo HM, Spande TF, Daly JW. Efficient enantio- and diastereodivergent synthesis of poison-frog alkaloids 251O and trans-223B.
J Org Chem 2009;
74:6784-91. [PMID:
19637860 DOI:
10.1021/jo901100m]
[Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient and flexible synthesis of poison-frog alkaloids 251O and trans-223B has been achieved by using for both alkaloids an enantiodivergent process starting from the common lactam 1. The relative stereochemistry of 251O and trans-223B was determined to be 7 (R = n-C(7)H(15), R' = n-Pr) and 14 by the present enantioselective synthesis.
Collapse