Hydroboration-oxidation of ricinoleic acid ester derivatives
摘要:
The chiral center in ricinoleic acid methyl ester (ee similar to 100%) strongly affects the regioselectivity of its hydroboration-oxidation, so that the resulting 1,3-diol dominates by 74% over the 1,4-isomer. Furthermore, new asymmetric centers are formed preferentially with (S)-configuration, up to 87% for 1,3-diols and up to 100% for 1,4-diols.
Hydroboration-oxidation of ricinoleic acid derivatives
作者:R. R. Muslukhov、A. Kh. Shayakhmetova、M. P. Yakovleva、O. V. Shitikova、G. Yu. Ishmuratov、G. A. Tolstikov
DOI:10.1134/s1070428008080046
日期:2008.8
The regioselectivily in the hydroboration-oxidation of ricinoleic acid derivatives only slightly depends oil the configuration of the optically active center: the fraction of the resulting 1,3-diol is larger by 6-10% than that of the 1.4-isomer. The new asymmetric center has preterentially S configuration, as follows from the formation of the corresponding stereoisomeric 1.3-dioxane from the 1,3-diol and of 2,5-dialkyltetrahydrofuran from the 1,4-diol.