Kinetic resolution of hydroxyalkanephosphonates catalyzed by Candida antarctica lipase B in organic media
作者:Yonghui Zhang、Chengye Yuan、Zuyi Li
DOI:10.1016/s0040-4020(02)00229-6
日期:2002.4
A series of hydroxyalkanephosphonates were studied as substrates for CALB catalyzed acetylation with emphasis on enantioselectivity and chemical structure of substrates. Some hydroxyalkanephosphonates could be resolved successfully to give both (R)- and (S)-isomers with high enantiomeric excess.
Synthesis and Herbicidal Activities of 2-Methylpropan-2-Aminium Methyl 1-(Substituted Phenoxyacetoxy) Alkylphosphonates
作者:Ling Gao、Xiaoyan Deng、Xiaosong Tan、Qingwu Long、Hao Peng、Hongwu He
DOI:10.1080/10426507.2012.736101
日期:2013.8.1
2-methylpropan-2-aminium methyl1-(substitutedphenoxyacetoxy) alkylphosphonates were selectively synthesized by reacting the corresponding dimethyl 1-(substitutedphenoxyacetoxy)alkylphosphonates with an excess of 2-methylpropan-2-amine. All the title compounds were identified by IR, 1H NMR, and 31P NMR, some of them were further analyzed by 19F NMR and 13C NMR. Their herbicidal activity was investigated and
Biocatalytic Promiscuity of Lipases in Carbon‐Phosphorus Bond Formation
作者:Dominik Koszelewski、Ryszard Ostaszewski
DOI:10.1002/cctc.201900397
日期:2019.5.20
A promiscuous lipase‐catalyzed carbon‐phosphorus bondformation is presented. The developed enzymatic Pudovik‐Abramov reaction of various aromatic and aliphatic aldehydes with dialkyl phosphonates provides biologically and pharmacologically relevant α‐hydroxy phosphonates with the yields from 11 % to 85 %. The developed protocol proceeds in the presence of porcine pancreas lipase under environmentally
Kinetic resolution of racemic α-hydroxyphosphonates by asymmetric esterification using achiral carboxylic acids with pivalic anhydride and a chiral acyl-transfer catalyst
作者:Isamu Shiina、Keisuke Ono、Takayoshi Nakahara
DOI:10.1039/c3cc44293d
日期:——
A practical protocol is developed to directly provide chiral alpha-acyloxyphosphonates and alpha-hydroxyphosphonates from (+/-)-alpha-hydroxyphosphonates utilizing the transacylation process to generate the mixed anhydrides from acid components and pivalic anhydride in the presence of organocatalysts (s-value = 33-518).
Synthesis and Herbicidal Activities of Sodium Hydrogen 1-(Substituted Phenoxyacetoxy)Alkylphosphonates
作者:Qingwu Long、Xiaoyan Deng、Yujiao Gao、Huayong Xie、Hao Peng、Hongwu He
DOI:10.1080/10426507.2012.717147
日期:2013.7.1
hydrogen 1-(substituted phenoxyacetoxy) alkylphosphonates was designed and synthesized. The test for herbicidalactivity indicated that most of the phosphonates (8) possessed excellent postemergence herbicidalactivities against broadleaf weeds. Especially, 8f and 8g showed the best herbicidalactivity against rape and amaranth with more than 95% inhibitory rate. Supplemental materials are available