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公开(公告)号:US6025177A
公开(公告)日:2000-02-15
申请号:US247731
申请日:1999-02-09
申请人: Chris Hugh Senanayake , Roger P. Bakale , Qun Kevin Fang , Paul Timothy Grover , Donald L. Heefner , Richard F. Rossi , Stephen Alan Wald
发明人: Chris Hugh Senanayake , Roger P. Bakale , Qun Kevin Fang , Paul Timothy Grover , Donald L. Heefner , Richard F. Rossi , Stephen Alan Wald
IPC分类号: C07C215/44 , C07C311/20 , C07D263/52 , C07D263/08
CPC分类号: C07D263/52 , C07C215/44 , C07C311/20 , C07C2101/14 , C07C2102/08 , Y02P20/582
摘要: Processes for preparing a single enantiomer of an .alpha.,.alpha.-disubstituted-.alpha.-hydroxy acetic acid, especially cyclohexylphenylglycolic acid (CHPGA), is disclosed. The processes employ cyclic 1,2-aminoalcohols as chiral auxiliaries by forming diastereomeric esters of aminoalcohols or diastereomeric amides of oxazolidines. ##STR1## Intermediates useful in the process are also disclosed.
摘要翻译: 公开了制备α,α-二取代-α-羟基乙酸,特别是环己基苯基乙醇酸(CHPGA)的单一对映异构体的方法。 该方法通过形成恶唑烷的氨基醇或非对映体酰胺的非对映异构体酯,将环状1,2-氨基醇用作手性助剂。 还公开了在该方法中有用的中间体。
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公开(公告)号:US6013830A
公开(公告)日:2000-01-11
申请号:US050825
申请日:1998-03-30
申请人: Chris Hugh Senanayake , Roger P. Bakale , Qun Kevin Fang , Paul Timothy Grover , Donald L. Heefner , Richard F. Rossi , Stephen Alan Wald
发明人: Chris Hugh Senanayake , Roger P. Bakale , Qun Kevin Fang , Paul Timothy Grover , Donald L. Heefner , Richard F. Rossi , Stephen Alan Wald
IPC分类号: C07C215/44 , C07C311/20 , C07D263/52 , C07C69/76 , C07D263/54
CPC分类号: C07D263/52 , C07C215/44 , C07C311/20 , C07C2101/14 , C07C2102/08 , Y02P20/582
摘要: Processes for preparing a single enantiomer of an .alpha.,.alpha.-disubstituted-.alpha.-hydroxy acetic acid, especially cyclohexylphenylglycolic acid (CHPGA), is disclosed. The processes employ cyclic 1,2-aminoalcohols as chiral auxiliaries by forming diastereomeric esters of aminoalcohols or diastereomeric amides of oxazolidines. ##STR1## Intermediates useful in the process are also disclosed.
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