Ra. Barrow et al., Synthesis of 1-aza-cryptophycin 1, an unstable cryptophycin. An unusual skeletal rearrangement, TETRAHEDRON, 56(21), 2000, pp. 3339-3351
A total synthesis of cryptophycin 337 (1-aza-cryptophycin 1, 2), an analogu
e of the potent antitumor antibiotic cryptophycin 1 (1), is described. Cryp
tophycin 337 was unstable and underwent an unexpected skeletal rearrangemen
t. (R)-Mandelic acid was used as the sole source of asymmetry for the synth
esis of unit A. (C) 2000 Elsevier Science Ltd. All rights reserved.