Triisobutylaluminium mediated carbocyclisation of sugar derived spiroketals and ketosides
摘要:
The carbocyclisation of sugar derived spiroketals and ketosides under the agency of triisobutylaluminium is presented. In addition, the synthetic usefulness of cyclooctenic product 21, derived from the corresponding exo-glycal 20, was shown by its transformation into conformationally locked L-idose analogues 22 and 23. (C) 2001 Elsevier Science Ltd. All rights reserved.