Oxazaborolidine-Catalyzed Enantioselective Reduction of α-Methylene Ketones to Allylic Alcohols
摘要:
Oxazaborolidine-catalyzed enantioselective reduction of a-methylene ketones was efficiently carried out by using borane-diethylaniline as a stoichiometric reducing agent. The combination of this method and subsequent hydrogenation of thus-formed allylic alcohol improved stereoselectivity in the reduction of 24-oxocholesteryl ester to 24-(R)-hydroxycholesteryl ester.
The invention provides a method for inhibiting bacterial attachment to a surface, the method comprising forming the surface from a polymer, or applying a polymer to the surface, wherein the polymer is a homopolymer formed from a (meth) acrylate or (meth) acrylamide monomer or a copolymer formed from one or more (meth) acrylate or (meth) acrylamide monomers, wherein the (meth) acrylate or (meth) acrylamide monomers are of formula (I) or (II):
[H
2
C═CR′—C(═O)—O—]
n
R (I)
[H
2
C═CR′—C(═O)—NH—]
n
R (II)
wherein
n is 1, 2 or 3,
R′ is independently H or CH
3
,
R is an organic group having a total of from 2 to 24 carbon atoms, wherein the organic group includes an aliphatic or aromatic hydrocarbon moiety and wherein the organic group does not include any hydroxyl groups.