Stereocontrolled reactions induced by a thermolabile group. Synthesis of optically active 1,3-diols.
作者:Robert Bloch、Michel Bortolussi、Christian Girard、Matar Seck
DOI:10.1016/s0040-4020(01)89007-4
日期:——
of phosphonates with optically active lactol 1 lead preferentially to one diastereoisomer. 2. Force field calculations conducted on one pair of diastereoisomers 2c and 2′c predict that these isomers must exist in different conformations of similar energies. 1H NMR data are in good agreement with these predictions. The dihydrofurans obtained by retro Diels-Alder reactions of 2 are easily transformed
膦酸酯的与光学活性的乳醇的维蒂希霍纳-迈克尔反应1引线优先与一个非对映体。2。在一对非对映异构体2c和2'c上进行的力场计算预测,这些异构体必须以相似能量的不同构象存在。1 H NMR数据与这些预测非常吻合。通过复古狄尔斯-阿尔德反应获得的二氢呋喃2很容易转化为光学纯的1,3-二醇,R的前体- (+) - α硫辛酸和( - ) - (1R,3R,5S) - 1, 3-二甲基-2,9-二氧杂双酰基[3.3.1]壬烷。