A cyclopropanol-based approach to synthesis of Unit A of the cryptophycins
摘要:
A new asymmetric synthesis of Unit A of the cryptophycins has been carried out yielding 13% of the target product over 14 steps. The key steps of the synthesis were diastereoselective hydroboration-oxidation reactions performed on the alkenyl moiety of a 1,3-dioxane derivative 8, which can be easily prepared via the Kulinkovich cyclopropanation of protected diethyl (S)-(-)-malate followed by transformation of the resulting small rings of the product 6 into the functional groups necessary for the synthesis of the target compound. (C) 2014 Elsevier Ltd. All rights reserved.
A cyclopropanol-based approach to synthesis of Unit A of the cryptophycins
摘要:
A new asymmetric synthesis of Unit A of the cryptophycins has been carried out yielding 13% of the target product over 14 steps. The key steps of the synthesis were diastereoselective hydroboration-oxidation reactions performed on the alkenyl moiety of a 1,3-dioxane derivative 8, which can be easily prepared via the Kulinkovich cyclopropanation of protected diethyl (S)-(-)-malate followed by transformation of the resulting small rings of the product 6 into the functional groups necessary for the synthesis of the target compound. (C) 2014 Elsevier Ltd. All rights reserved.