Method for producing optically active lactone compounds by using salen cobalt complexes having a cis-beta structure
申请人:Kyushu University
公开号:US20030120091A1
公开(公告)日:2003-06-26
A method for producing an optically active lactone compound by Baeyer-Villiger oxidation of a cyclic ketone compound with at least one kind of oxidants selected from the group consisting of hydrogen peroxide and urine-hydrogen peroxide adduct (UHP) using a cobalt(salen) complex having a cis-&bgr; structure expressed by the following formula (I) or (II) as a catalyst.
1
in which X and Y independently denote H, a t-butyl group or an electron-withdrawing substituting group and W is a halogen element.
2
in which X and Y independently denote H, a t-butyl group or an electron-withdrawing substituting group and Z
−
is a monovalent anion. The optically active lactone compounds can be used for the synthesis of medicines and argochemicals.
Method for producing optically active lactone compounds by using salen cobalt complexes having a cis-&bgr; structure
申请人:Kyushu University
公开号:US06713435B2
公开(公告)日:2004-03-30
A method for producing an optically active lactone compound by Baeyer-Villiger oxidation of a cyclic ketone compound with at least one kind of oxidants selected from the group consisting of hydrogen peroxide and urine-hydrogen peroxide adduct (UHP) using a cobalt(salen) complex having a cis-&bgr; structure expressed by the following formula (I) or (II) as a catalyst.
in which X and Y independently denote H, a t-butyl group or an electron-withdrawing substituting group and W is a halogen element.
in which X and Y independently denote H, a t-butyl group or an electron-withdrawing substituting group and Z− is a monovalent anion. The optically active lactone compounds can be used for the synthesis of medicines and argochemicals.
A Concise Route to Racemic Anatoxin a from Cycloocta-1,5-diene
作者:Tse-Lok Ho、Elvira Zinurova
DOI:10.1002/hlca.200690005
日期:2006.1
The synthesis of racemic anatoxin a (1a) from cycloocta-1,5-diene via its 1 : 1 cycloadduct with N-chlorosulfonyl isocyanate is described. The N-unsubstituted β-lactam 2b was converted to a β-amino ester 3 which was then submitted to a Pd-catalyzed cyclization to afford the conjugated ester 4a. The N-tosyl derivative 4b was then elaborated into N-tosylanatoxin a (1b) via a Weinreb amide.
A method for producing optically active lactone compounds by using salen cobalt complexes having a CIS-Beta structure
申请人:KYUSHU UNIVERSITY
公开号:EP1288210A2
公开(公告)日:2003-03-05
A method for producing an optically active lactone compound by Baeyer-Villiger oxidation of a cyclic ketone compound with at least one kind of oxidants selected from the group consisting of hydrogen peroxide and urine-hydrogen peroxide adduct (UHP) using a cobalt(salen) complex having a cis-β structure expressed by the following formula (I) or (II) as a catalyst.
in which X and Y independently denote H, a t-butyl group or an electron-withdrawing substituting group and W is a halogen element.
in which X and Y independently denote H, a t-butyl group or an electron-withdrawing substituting group and Z- is a monovalent anion. The optically active lactone compounds can be used for the synthesis of medicines and argochemicals.
一种利用具有下式(I)或(II)表示的顺式-β结构的钴(salen)络合物作为催化剂,通过环酮化合物与至少一种选自过氧化氢和尿-过氧化氢加合物(UHP)组成的组的氧化剂进行拜耳-维里格氧化反应生产光学活性内酯化合物的方法。
其中 X 和 Y 分别表示 H、叔丁基或抽电子取代基,W 为卤素元素。
其中 X 和 Y 分别表示 H、叔丁基或抽电子取代基,Z- 是一价阴离子。光学活性内酯化合物可用于合成药物和芳香化学品。