Search Results:　 1-20 of 275

Singh Pardeep , Singh Parvesh , Kumar Kewal 他

Heterocycles : an international journal for reviews and communications in heterocyclic chemistry 86(2), 1301-1322, 2012-12-31

KURASHINA Yusuke , KUWAHARA Shigefumi

… The protected stereoisomer of a trihydroxy unsaturated fatty acid, which could be employed as a potential nigricanoside α-chain building block, was synthesized by using Evans asymmetric alkylation, Sharpless kinetic resolution, and diastereoselective reduction as the key steps. …

Bioscience, Biotechnology, and Biochemistry 76(3), 605-607, 2012-03-23

J-STAGE CrossRef References (8)

Patil Dadasaheb V. , Cavitt Marchello A. , France Stefan

Heterocycles 84(2), 1363-1373, 2012-01-01

Shishido Kozo

… The highly diastereoselective constructions of tri- and tetra-substituted tetrahydropyrans employing intramolecular oxy-Michael (IMOM) reactions have been developed and successfully applied to the first generation total syntheses of aspergillides A and C. … However, the longer reaction steps and lower overall yields prompted us to try and devise a general methodology that would be useful for a highly efficient synthesis of all the aspergillides. …

Journal of Synthetic Organic Chemistry, Japan 70(11), 1196-1205, 2012

J-STAGE CrossRef

Hirata Shigeo , Kuriyama Masami , Onomura Osamu

… Diastereoselective introduction of phosphono groups into l-proline derivatives at the 5-position was achieved with suitable selection of N-protecting group. …

Tetrahedron 67(48), 9411-9416, 2011-12-00

IR CrossRef

Dema Haythem K. , Foubelo Francisco , Yus Miguel

Heterocycles 82(2), 1411-1421, 2011-03-01

KUROSAWA Wataru , ROBERTS Paul M. , DAVIES Stephen G.

… We have developed a metal-free and highly diastereoselective ammonium-directed dihydroxylation of 3-aminocyclohex-1-enes upon treatment with Cl3CCO2H followed by mCPBA. … The ammonium-directed oxidation protocol is general for a range of cyclic allylic and homoallylic amines and facilitates the metal-free synthesis of all four diastereoisomers of the corresponding 3-amino-1,2-diols, and has recently been employed as one of the key steps in the syntheses of (±)-1-deoxynojirimycin and (±)-1-deoxyaltronojirimycin. …

Journal of Synthetic Organic Chemistry, Japan 68(12), 1295-1306, 2010-12-01

J-STAGE CrossRef References (66)

Yoshida Masahiro , Higuchi Mariko , Shishido Kozo

TETRAHEDRON 66(14), 2675-2682, 2010-00-00

IR

Takemoto Yoshiji

… The bifunctional aminothiourea could be used efficiently for a wide range of diastereoselective and enantioselective nucleophilic reactions such as Michael addition of 1,3-dicarbonyl compounds to nitroolefines, aza-Henry reaction of nitroalkanes to N-Boc imines, and hydrazination of cyclic β-keto esters. …

Chemical and Pharmaceutical Bulletin 58(5), 593-601, 2010

J-STAGE CrossRef Cited by (1)

Minato Daishirou , Mizuta Satoshi , Kuriyama Masami , Matsumura Yoshihiro , Onomura Osamu

… A convenient method for synthesis of optically active azetidin-2-ones using electrochemical oxidation has been exploited. … The method consists of a diastereoselective intramolecular C-C bond forming reaction between active methylene and methyne groups through an electrochemical system in which positive iodine species acted as mediators under mild conditions. …

Tetrahedron 65(47), 9742-9748, 2009-11-21

IR