This letter describes syntheses of (-)-(7S)-and (+)-(7R)-K252a dimers wherein a convergent bis-indole-N-glycosidic coupling step was used for the resolution of the C(7) substituted (+/-)-aglycon. Dimerization of the derived monomers was achieved via olefin methathesis. (C) 2002 Elsevier Science Ltd. All rights reserved.
This letter describes syntheses of (-)-(7S)-and (+)-(7R)-K252a dimers wherein a convergent bis-indole-N-glycosidic coupling step was used for the resolution of the C(7) substituted (+/-)-aglycon. Dimerization of the derived monomers was achieved via olefin methathesis. (C) 2002 Elsevier Science Ltd. All rights reserved.