Efficient Synthesis of (3R,5S)-3,5,6-Trihydroxyhexanoic Acid Derivative as a Chiral Side Chain of Statins
摘要:
Efficient synthesis of tert-butyl [(3R,5S)-6-hydroxymeth yl-2,2-dimethyl-1,3-dioxan-4-yl]acetate (1) has been accomplished. Unprecedented hydration of 3 in the presence of lithium chloride provided 4a,b, the primary hydroxyl group of which reacted with pivaloyl-and I-naphthoyl chloride, respectively, in pyridine to give 7a or 7d in improved selectivity. Diastereoselective reduction of 7a and protection-deprotection sequence provided 1.
Efficient Synthesis of (3R,5S)-3,5,6-Trihydroxyhexanoic Acid Derivative as a Chiral Side Chain of Statins
摘要:
Efficient synthesis of tert-butyl [(3R,5S)-6-hydroxymeth yl-2,2-dimethyl-1,3-dioxan-4-yl]acetate (1) has been accomplished. Unprecedented hydration of 3 in the presence of lithium chloride provided 4a,b, the primary hydroxyl group of which reacted with pivaloyl-and I-naphthoyl chloride, respectively, in pyridine to give 7a or 7d in improved selectivity. Diastereoselective reduction of 7a and protection-deprotection sequence provided 1.