35572-34-0Relevant articles and documents
Imidazolium-based chiral ionic liquids: Synthesis and application
Suzuki, Yumiko,Wakatsuki, Junichiro,Tsubaki, Mariko,Sato, Masayuki
, p. 9690 - 9700 (2013/10/22)
Synthesis of chiral ionic liquids containing an imidazole nucleus and chiral centers on N-substituents is reported. [(2S,3S)-2,3-Dihydroxybutane-1,4- bis(3-butylimidazolium)]-[bis(trifluoromethanesulfonyl)amide]2 and [(4S,5S)-2-phenyl-1,3-dioxo
Synthesis and enantiomeric selectivity of chiral crown ethers
Luk'yanenko,Lobach,Leus,Titova
, p. 895 - 899 (2007/10/03)
Condensation of (4S,5S)-4,5-dihydroxymethyl-2-substituted dioxolanes with polyethylene glycols ditosylates yielded new chiral crown ethers. By potentiometry the enantioselectivity of complexing between the compounds obtained and L- and D-valine methyl ester hydrochlorides was evaluated.
Tartrate-Derived Aryl Aldehyde Acetals in the Asymmetric Directed Metalation of Chromium Tricarbonyl Arene Complexes
Kondo, Yoshinori,Green, James R.,Ho, Jianwei
, p. 6182 - 6189 (2007/10/02)
A series of three chromium tricarbonyl benzaldehyde acetal complexes were prepared from benzaldehyde diethyl acetal and (+)-diethyl tartrate.These compounds were ortho-lithiated by a number of bases, and the diastereoselectivity of lithiation was determined by quenching of the resulting anions with Me3SiCl.Complexes 1 and 2 were found to give moderate levels of diastereoselection, while the combination of complex 3 and 2.4 equiv of n-BuLi under equilibrating conditions gave an 86percent de of silylated products.Other electrophiles gave slightly higher de's (88percent to >/= 94percent), and all products derived from 3 were separable by column chromatography.Hydrolysis of the ortho-methylated product to the corresponding benzaldehyde complex (-)-21 as well as X-ray structural analysis of the trimethylsilylated complex demonstrated that preferential pro-R deprotonation had occurred.
Preparation of (4R,5S)-(5-methyl-2,2-dimethyl-1,3-dioxolane-4-ylmethyl)-phosphonium iodide. A synthetic approach to olguine: further model studies
Valverde, Serafin,Herradon, Bernardo,Rabanal, Rosa M.,Martin-Lomas, Manuel
, p. 332 - 338 (2007/10/02)
The enantiomerically pure title compound ((4R,5S)-(5-methyl-2,2-dimethyl-1,3-dioxolane-4-ylmethyl)-phosphonium iodide) has been synthesized starting from (R,R)-(+)-tartaric acid.The synthesis of an oliguine analog has been carried out.Attempts have been made to improve the stereoselectivity and yield of key steps.
Selective Manipulation of Hydroxy Groups in (2S,3S)-Threitol
Takano, Seiichi,Kurotaki, Ayako,Sekiguchi, Yoshinori,Satoh, Shigeki,Hirama, Michiyasu,Ogasawara, Kunio
, p. 811 - 817 (2007/10/02)
Systematic transformation of diethyl (2R,3R)-tartrate into a number of protected or functionalized derivatives of threitol, which are important precursors for many natural products, is carried out employing reductive and oxidative cleavage reactions of be
NOVEL (4+1) FRAGMENT COMBINATION APPROACH TO CHIRAL CYCLOPENTANOIDS FROM TARTARIC ACID
Barriere, Francoise,Barriere, Jean-Claude,Barton, Derek H. R.,Cleophax, Jeanine,Gateau-Olesker, Alice,et al.
, p. 3121 - 3124 (2007/10/02)
A chiral cyclopentanoid building block 29 has been synthesized in a "one pot" cyclization process from epoxides 22-25 (which are readily accessible from (R,R)-(+)-tartaric acid) with the carbanion derived from phenylthioacetonitrile (PhS-CH2-CN).
AN ECONOMICAL LARGE SCALE PREPARATION OF (2S,3S)-4,5-DIMETHYL-2-PHENYL-1,3-DIOXOLAN
Kocienski, Philip,Street, Stephen D. A.
, p. 1087 - 1092 (2007/10/02)
An economical 5-step synthesis of (2S,3S)-4,5-dimethyl-2-phenyl-1,3-dioxolan from (2R,3R)-tartaric acid is described.