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。
The reaction betweentrans-2-alkylaminocycloalkanols and formaldehyde
作者:Peter M. R. Barkworth、Trevor A. Crabb
DOI:10.1002/mrc.1270170408
日期:1981.12
Abstracttrans‐2‐Alkylaminocyclohexanols and trans‐2‐alkylaminocycloheptanols condense with formaldehyde to give perhydrocycloalkano[d][1,3]oxazoles, whereas trans‐2‐alkylaminocyclopentanols give rise to perhydrocyclopentano[f][1,3,5]dioxazepines. The two types of ring systems are characterized by differing proton‐proton geminal coupling constants and 13C NMR parameters.
Mousseron; Granger, Bulletin de la Societe Chimique de France, 1947, vol. <5>, p. 850,853
作者:Mousseron、Granger
DOI:——
日期:——
The Reactions of -Aminoalkyl Hydrogen Sulfates. I. The Preparation of Some Substituted Thiazolidine-2-thiones<sup>1</sup>
作者:Charles S. Dewey、Richard A. Bafford
DOI:10.1021/jo01013a046
日期:1965.2
Sicher; Svoboda, Collection of Czechoslovak Chemical Communications, 1958, vol. 23, p. 1252,1268