Diphenyloxazaborolidine a new catalyst for enantioselective reduction of ketones
作者:George J. Quallich、Teresa M. Woodall
DOI:10.1016/s0040-4039(00)60513-0
日期:1993.6
A variety of ketones can be reduced in high enantioselectivity with the oxazaborolidinesderivedfrom commercially available erythro aminodiphenylethanol.
衍生自市售赤型氨基二苯乙醇的恶唑硼烷可以高对映选择性还原多种酮。
Bakers' Yeast Reduction of γ and δ Ketonitriles: Intermediates for the Synthesis of (S)-5-Hexanolide and Other Chiral Lactones
yeast carefully studied. Both 4-oxopentanenitrile and 5-oxohexanenitrile are reduced in moderate yields to the corresponding (S) alcohols of high ee while other substrates gave products of varying optical purities. These alcohols are useful intermediates for the preparation of chiral lactones, including the synthetically important (S)(−)-4-methylbutyrolactone and (S)-(−)-5-hexanolide.
摘要 已经合成了许多 γ 和 δ 酮腈,并仔细研究了它们用面包酵母的还原。4-氧代戊腈和 5-氧代己腈均以中等产率还原为相应的高 ee (S) 醇,而其他底物产生不同光学纯度的产物。这些醇是制备手性内酯的有用中间体,包括合成重要的 (S)(-)-4-甲基丁内酯和 (S)-(-)-5-己内酯。
Enantioselective oxazaborolidine reduction of ketones containing heteroatoms
作者:George J. Quallich、Teresa M. Woodall
DOI:10.1016/0040-4039(93)89012-f
日期:1993.1
Ketones which contain heteroatom, particularly nitrogen, can be enantioselectively and catalytically reduced with chiral oxazaborolidines in the presence of excess borane.
Synthesis of .delta.-lactones via radical carbon-carbon bond formation using chiral radical precursors
作者:Dale B. Gerth、Bernd Giese
DOI:10.1021/jo00369a039
日期:1986.9
Synthesis of the carpenter bee pheromone. Chiral 2-methyl-5-hydroxyhexanoic acid lactones