PHOTOCATALYTIC ASYMMETRIC SYNTHESIS OF L-α-VALINE FROM3-METHYL-2-OXOBUTANOIC ACID WITH CHIRAL Rh(Ⅱ)COMPLEXES AND POWDERY SEMICONDUCTORS

doi:10.7517/j.issn.1674-0475.1995.01.48

Imaging Science and Photochemistry ›› 1995, Vol. 13 ›› Issue (1): 48-52.DOI: 10.7517/j.issn.1674-0475.1995.01.48

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PHOTOCATALYTIC ASYMMETRIC SYNTHESIS OF L-α-VALINE FROM3-METHYL-2-OXOBUTANOIC ACID WITH CHIRAL Rh(Ⅱ)COMPLEXES AND POWDERY SEMICONDUCTORS

WANG HAN-HUI¹, YUJIA-YONG¹, HUANG JI-PING¹, CUI GUO-ZHU¹, YANG SHI-YAN², SUN WEN-HUA², LIU JIN-XIA²

1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China;
2. Stale Key Laboratory of OSSO, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, P.R. China

Received:1994-03-12 Revised:1994-09-26 Online:1995-02-20 Published:1995-02-20

Abstract

Abstract: Photo catalytic asymmetric synthesis of L-α-valine from 3-methyl-2-oxobutanoic acid has been carried out in up to 64%e.e. in apueous solution of metbanol ammonia with chiral(+)-diop-Rh(Ⅰ)complexes(diop:2,3-o-isopropylidene-2,3-dihydroxy-1,4-bis(diphenyl-phosphino)butane)and semiconductor photocatalysts CdS,Pt/CdS,TiO₂,Pt/TiO₂ irradi-ated 10 h under 500W Xenon lamp.

Key words: photocatalytic asymmetric synthesis, L-α-valine, (+)-diop-Rh(Ⅰ), semicondllctor

WANG HAN-HUI, YUJIA-YONG, HUANG JI-PING, CUI GUO-ZHU, YANG SHI-YAN, SUN WEN-HUA, LIU JIN-XIA. PHOTOCATALYTIC ASYMMETRIC SYNTHESIS OF L-α-VALINE FROM3-METHYL-2-OXOBUTANOIC ACID WITH CHIRAL Rh(Ⅱ)COMPLEXES AND POWDERY SEMICONDUCTORS[J]. Imaging Science and Photochemistry, 1995, 13(1): 48-52.

PHOTOCATALYTIC ASYMMETRIC SYNTHESIS OF L-α-VALINE FROM3-METHYL-2-OXOBUTANOIC ACID WITH CHIRAL Rh(Ⅱ)COMPLEXES AND POWDERY SEMICONDUCTORS

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