An investigation of chiral diamides as organocatalysts in asymmetric aldol reaction
作者:Dilek Gul Yilmaz、Feray Aydogan、Cigdem Yolacan
DOI:10.1002/jhet.4457
日期:2022.7
proline and 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (THIQA) based diamides were synthesized successfully by simple amidation reactions and characterized by their spectral data. Their catalytic activities in asymmetricaldolreaction were performed by the reactions of aliphatic ketones and various aromatic aldehydes. Especially, (S)-N-((S)-1-(morpholinoamino)-1-oxo-3-phenylpropan-2-yl)pyrrolidine-2-carboxamide
通过简单的酰胺化反应成功合成了七种新型脯氨酸和 1,2,3,4-四氢异喹啉-3-羧酸 (THIQA) 基二酰胺,并通过其光谱数据进行了表征。它们在不对称羟醛反应中的催化活性是通过脂肪酮和各种芳香醛的反应进行的。特别是,( S ) -N -(( S )-1-(吗啉代氨基)-1-氧代-3-苯基丙-2-基)吡咯烷-2-甲酰胺( 9e) 在苯甲酸助催化剂存在下,在室温下在水中表现出良好的催化活性。对映选择性高达89.6%,非对映体比高达92/8,收率高达97.3%。该催化剂在水中表现出最好的催化活性;这也是对绿色化学要求的重要贡献。
A facile approach for the synthesis of pseudo-peptides incorporating a (2S, 3R)-2-amino-cyclopropane carboxylic acid residue
作者:David E. Hibbs、Michael B. Hursthouse、Iwan G. Jones、Wyn Jones、K.M.Abdul Malik、Michael North
DOI:10.1016/s0040-4020(97)10165-x
日期:1997.12
The synthesis of a pseudo-tripeptide 9 and a pseudo-pentapeptide 1 incorporating the conformationally constrained β-amino acid (2S, 3R)-2-amino cyclopropane carboxylic acid is reported. The key steps of the synthesis are the desymmetrisation of cyclopropane 1,2-dicarboxylic anhydride using (S)-proline t-butyl ester followed by a Curtius rearrangement. Subsequent trapping of the isocyanate with (S)-proline
Desymmetrisation of bicyclic, meso-anhydrides by proline esters
作者:Iwan G Jones、Wyn Jones、Michael North、Marta Teijeira、Eugenio Uriarte
DOI:10.1016/s0040-4039(96)02433-1
日期:1997.2
The desymmetrisation of cyclopropane and cyclopentane derived bicyclic meso-anhydrides using proline esters provides a versatile approach to the synthesis of enantiomerically pure amido acids which can subsequently be converted into beta-amino acid containing peptide analogues. (C) 1997, Elsevier Science Ltd.