Synthesis of EnantiopureN-tert-Butoxycarbonyl-2-aminocycloalkanones
摘要:
A route to enantiomerically pure N-tert-butoxycarbonyl-2-aminocycloalkanones (ring size: 5-8 membered) from the corresponding cycloalkene oxides is described. The procedure involves (1) aminolysis with (S)-alpha-methylbenzylamine/Me3Al and chromatographic separation of diastereomers, (2) hydrogenolysis to afford the trans-2-aminocycloalkanols, (3) tert-butoxycarbonyl (Boc) protection, and (4) PCC oxidation.
提出了(±)-反式-2-叠氮基环己醇和(±)-反式-2-叠氮基环辛醇的拆分可以用( R )-扁桃酸来实现。这些叠氮醇的( R )-扁桃酸酯可以通过硅胶柱色谱以有效的方式分离。通过K 2 CO 3将非对映体纯的( R )-扁桃酸酯进行甲醇解(酯交换),获得对映体纯的反式-2-叠氮基己醇和反式-2-叠氮基环辛醇。通过对它们进行一些对映特异性转化,例如光延反应和叠氮化物官能团的氢解,也证明了它们的合成相关性。值得注意的是,这是第一个报道对映体纯反式-2-叠氮基环辛醇制备的研究。
Barkworth, Peter M. R.; Crabb, Trevor A., Journal of the Chemical Society. Perkin transactions II, 1982, p. 91 - 94
作者:Barkworth, Peter M. R.、Crabb, Trevor A.
DOI:——
日期:——
Adenosine derivatives
申请人:GLAXO GROUP LIMITED
公开号:EP0322242B1
公开(公告)日:1998-04-01
US5032583A
申请人:——
公开号:US5032583A
公开(公告)日:1991-07-16
Synthesis of Enantiopure<i>N-tert</i>-Butoxycarbonyl-2-aminocycloalkanones
作者:Jeffrey Aubé、Michael S. Wolfe、Rhonda K. Yantiss、Scott M. Cook、Fusao Takusagawa
DOI:10.1080/00397919208021127
日期:1992.11
A route to enantiomerically pure N-tert-butoxycarbonyl-2-aminocycloalkanones (ring size: 5-8 membered) from the corresponding cycloalkene oxides is described. The procedure involves (1) aminolysis with (S)-alpha-methylbenzylamine/Me3Al and chromatographic separation of diastereomers, (2) hydrogenolysis to afford the trans-2-aminocycloalkanols, (3) tert-butoxycarbonyl (Boc) protection, and (4) PCC oxidation.
Resolution of trans-2-azidocycloalkanols by separation of their mandelic acid esters
作者:Tolga A. Yeşil、Mustafa Yavuz、Erkan Ertürk
DOI:10.1016/j.tetlet.2023.154828
日期:2023.12
It is presented that resolution of (±)-trans-2-azidocylohexanol and (±)-trans-2-azidocyclooctanol can be effected with (R)-mandelic acid. (R)-Mandelate esters of these azido alcohols can be separated by column chromatography on silica gel in an efficient manner. Upon methanolysis (transesterification) of the diastereomerically pure (R)-mandelate esters by K2CO3, enantiomerically pure trans-2-azidocylohexanols
提出了(±)-反式-2-叠氮基环己醇和(±)-反式-2-叠氮基环辛醇的拆分可以用( R )-扁桃酸来实现。这些叠氮醇的( R )-扁桃酸酯可以通过硅胶柱色谱以有效的方式分离。通过K 2 CO 3将非对映体纯的( R )-扁桃酸酯进行甲醇解(酯交换),获得对映体纯的反式-2-叠氮基己醇和反式-2-叠氮基环辛醇。通过对它们进行一些对映特异性转化,例如光延反应和叠氮化物官能团的氢解,也证明了它们的合成相关性。值得注意的是,这是第一个报道对映体纯反式-2-叠氮基环辛醇制备的研究。