126986-28-5Relevant academic research and scientific papers
Gold(I)/copper(II)-cocatalyzed tandem cyclization/semipinacol reaction: Construction of 6-Aza/Oxa-Spiro[4.5]decane skeletons and formal synthesis of (±)-halichlorine
Zhu, Dao-Yong,Zhang, Zhen,Mou, Xue-Qing,Tu, Yong-Qiang,Zhang, Fu-Min,Peng, Jin-Bao,Wang, Shao-Hua,Zhang, Shu-Yu
, p. 747 - 752 (2015)
A simple and efficient strategy for the construction of 6-aza/oxa-spiro[4.5]decane skeletons under the cocatalysis of gold(I)/copper(II) was developed, and its potential utility was demonstrated by a formal synthesis of the biologically active marine alkaloid (±)-halichlorine.
Site-specific and asymmetric hydrolysis of prochiral 2-phenyl-1,3- propanediol diacetate by a bacterial esterase from an isolated strain
Mitsui, Ryoji,Shinya, Seiho,Ichiyama, Yuichi,Kudo, Kenta,Tsuno, Takuo,Tanaka, Mitsuo
, p. 1858 - 1864 (2008/02/13)
Bacillus cereus 809A and Burkholderia sp. 711C were isolated from soil. These strains demonstrate hydrolysis activity towards prochiral 2-phenyl-1,3-propanediol diacetate and accumulated the corresponding chiral monoacetates into the reaction mixture. When 2-phenyl 1,3-propanediol diacetate was used as a substrate, the produced monoacetates with Burkholderia sp. 711C were obtained in a racemic form but that produced by Bacillus cereus 809A showed an excess of the (S)-form. The resting cell reaction revealed that for Bacillus cereus 809A, there was an enrichment of one of the enantiomers of the monoacetate such that the enantiomeric excess (e.e.) of the (S)-form was over 95%. The purified enzyme from Bacillus cereus 809A hydrolyzed diacetate to monoacetate, and the e.e. value of the (S)-form increased by prolonged reaction in a way similar to the resting cell reaction. From N-terminal amino acids, this esterase is conserved in some strains of Bacillus for which the genomic sequences have been reported.
Selective mono-acylation of meso- and C2-symmetric 1,3- and 1,4-diols
Clarke, Paul A.
, p. 4761 - 4763 (2007/10/03)
The direct one-pot mono-acylation of meso and C2-symmetric 1,3- and 1,4-diols has been achieved using carboxylic acid anhydrides and catalytic amounts of cerium trichloride.
Unique Template Effects of Distannoxane Catalysts in Transesterification of Diol esters
Otera, Junzo,Dan-oh, Nobuhisa,Nozaki, Hitosi
, p. 3065 - 3074 (2007/10/02)
1,n-Diol diacetates (n = 2,3,4) are selectively converted into the corresponding monoacetates by distannoxane-catalyzed transesterification.Such unique selectivity is not encountered with 1,n-diol diacetates where n>/=5.A great difference in reactivity is also seen in the transesterification between methyl butyrate and 1,n-diol monoacetates: the ethylene glycol derivative sluggishly undergoes transesterification whereas higher homologs react smoothly.The unique template effects of the catalysts are discussed in terms of cooperation of two different tin atoms which are located in the proximity.
Enzyme catalyzed monohydrolysis of 2-aryl-1 3-propanediol diacetates. A study of structural effects of the aryl moiety on the enantioselectivity
Guanti, Giuseppe,Narisano, Enrica,Podgorski, Tadeusz,Thea, Sergio,Williams, Andrew
, p. 7081 - 7092 (2007/10/02)
PPL catalyzed monohydrolysis of 2-aryl substituted 13-propanediol diacetates afforded the corresponding monoacetates in acceptable to fair chemical and optical yields. Electronic effects in the aromatic ring were examined. Elaboration of some 2-arylpropanediol monoacetates to optically active 2-arylpropanols and propanoic acids was performed.
