391107

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关键词:'391107'

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Reductive cross-coupling of 3-substituted delta 3-cephems with alkenyl halides in an Al/PbBr2/NiBr2(bpy) triplemetal redox system. Synthesis of 3-alkenyl-delta 3-cephems.

H Tanaka et al.

The Journal of organic chemistry, 66(2), 570-577 (2001-06-30)

Synthesis of 3-alkenyl-delta 3-cephems was performed successfully by cross-coupling 3-(trifluoromethylsulfonyloxy or chloro)-delta 3-cephem with alkenyl halides, e.g., vinyl bromide, trans-1-bromo-1-propene, and trans-beta-bromostyrene in an Al/cat.PbBr2/cat.NiBr2(bpy)/NMP (or DMF) system. Reduction of 3-(trifluoromethylsulfonyloxy)-delta 3-cephem into norcephalosporin was also achieved by a similar

Preparation of (+)-trans-isoalliin and its isomers by chemical synthesis and RP-HPLC resolution.

Lasanthi Jayathilaka et al.

Journal of biomolecular techniques : JBT, 25(3), 67-76 (2014-09-05)

Naturally occurring (+)-trans-isoalliin, (R(C)R(S))-(+)-trans-S-1-propenyl-L-cysteine sulfoxide, is a major cysteine sulfoxide in onion. The importance of producing it synthetically to support further research is very well recognized. The (+)-trans-isoalliin is prepared by chemical synthesis and reversed-phase (RP)-HPLC. First, S-2-propenyl-L-cysteine (deoxyalliin) is

Substituted Dienols from Palladium Catalyzed Coupling of Hydroaluminated Enynols with Aryl Iodides.

Crook KE, et al.

Letters in Organic Chemistry, 5(3), 158-164 (2008)

Structure Analysis of Poly (propylene-β-d oxide) by Proton Nuclear Magnetic Resonance Spectroscopy.

Oguni N, et al.

Macromolecules, 6(3), 459-465 (1973)

The Preparation of Long Chain Alkylamine Hydrochlorides1a.

Murr BL and Lester CT.

Journal of the American Chemical Society, 77(6), 1684-1685 (1955)

cis-trans Isomerization of 1-Bromo-1-propene and Related Compounds.

Harwell, KE and Hatch LF.

Journal of the American Chemical Society, 77(6), 1682-1684 (1955)

Facile synthesis of trans-S-1-propenyl-L-cysteine sulfoxide (isoalliin) in onions (Allium cepa).

Lee S, et al.

Bull. Korean Chem. Soc., 32, 319-320 (2011)

Palladium-catalyzed enantioselective alpha-arylation and alpha-vinylation of oxindoles facilitated by an axially chiral P-stereogenic ligand.

Alexander M Taylor et al.

Journal of the American Chemical Society, 131(29), 9900-9901 (2009-07-08)

The enantioselective alpha-arylation and alpha-vinylation of oxindoles catalyzed by Pd and a biarylmonophosphine ligand with both axial and phosphorus-based chirogenicity is reported. The resultant quaternary carbon stereocenters are formed in high enantiomeric excess, and the conditions tolerate a range of

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