Stereochemical aspects of the bioreduction of the conjugated double bond of perillaldehyde
摘要:
A study on the regioselective reduction of the conjugate double bond of perillaldehyde is described. The chemical reduction of this substrate was investigated in order to provide a straightforward access to the relevant natural flavour, dihydroperill-aldehyde. The biological reduction of both natural (S)-(-)-perillaldehyde and synthetic (R)-(+)-perillaldehyde was accomplished by means of fermenting baker's yeast. The latter microorganism converted, with different diastereoselectivity, the (S)- and (R)-enantiomers into the corresponding trans and cis saturated alcohols, respectively. The origin of the hydrogen atoms added to the double bond was studied by deuterium labelling experiments and H-2 NMR measurements that clearly demonstrate a different mechanism of the biohydrogenation of the two enantiomeric forms of perillaldehyde. (C) 2004 Elsevier Ltd. All rights reserved.
Loop-Grafted Old Yellow Enzymes in the Bienzymatic Cascade Reduction of Allylic Alcohols
作者:Sabrina Reich、Bettina M. Nestl、Bernhard Hauer
DOI:10.1002/cbic.201500604
日期:2016.4.1
Rational loop grafting transfers enzyme properties: The reaction activity in the bienzymatic cascade reduction of allylicalcohols was successfully transferred within ene reductases by the rational exchange of two β/α surface loop regions near the entrance of the active site.
Alicyclic compounds, their use and process for preparing same
申请人:Firmenich S.A.
公开号:US03993604A1
公开(公告)日:1976-11-23
Use of alicyclic compounds, some of which are new, as odor-modifying ingredients for manufacturing perfumes, perfumed products or synthetic essential oils, and as flavor-modifying ingredients for the manufacture of artificial flavors or for the aromatization of foodstuffs, animal feeds, pharmaceutical preparations or tobacco products. Process for preparing said alicyclic compounds.
Composition for reducing malodors and method for using the same
申请人:——
公开号:US20030199402A1
公开(公告)日:2003-10-23
A composition for reducing malodors in the air and on inanimate surfaces comprises a combination of at least one malodor neutralizing agent, at least one malodor binding agent, at least one malodor masking agent, and at least one performance agent. In accordance with one embodiment of the invention, the composition includes a surfactant component, a water dispersible polymer component, a metallic salt, a fragrance component, and a liquid carrier.
Padhi, Santosh Kumar; Bougioukou, Despina J.; Stewart, Jon D., Journal of the American Chemical Society, 2009, vol. 131, p. 3271 - 3280
作者:Padhi, Santosh Kumar、Bougioukou, Despina J.、Stewart, Jon D.
DOI:——
日期:——
Composition for reducing fabric wrinkles and method for using the same
申请人:——
公开号:US20040092423A1
公开(公告)日:2004-05-13
A composition for reducing fabric wrinkles is provided that generally comprises a silicone compound, a wetting agent, a drying agent, a liquid carrier, and a fragrance. The composition is preferably water clear, provides wrinkle reduction in a variety of fabrics, and is rapidly evaporated from the fabric. In accordance with one aspect of an exemplary embodiment of the invention, the wrinkle reducing composition does not employ a fragrance solubilizing agent.