来自生物质的原料受到自然界的定义和限制,但是通过选择催化剂,可以改变脱氧的结果。我们报告了糖与三乙基硅烷(TESH)和两种氟芳基硼烷催化剂B(C 6 F 5)3和B(3,5-CF 3)2 C 6 H 3)3(BAr 3,5-CF3)的发散性但选择性脱氧)。为了说明这一点,全硅烷基化的2-脱氧葡萄糖显示出环外C–O键的裂解/还原与较少的空间拥挤的BAr 3,5-CF3,而环内的C–O键的裂解/还原则以路易斯酸B(C更多)为主6 F 5)3。取决于催化剂,可以选择性地合成手性呋喃和线性多元醇。机理研究表明,这些催化剂的静止状态是不同的。
Selective C−O Bond Cleavage of Sugars with Hydrosilanes Catalyzed by Piers’ Borane Generated In Situ
作者:Jianbo Zhang、Sehoon Park、Sukbok Chang
DOI:10.1002/anie.201708109
日期:2017.10.23
[(C6F5)2BH], generated in situ, is demonstrated to promote the hydrosilylative reduction of sugars, providing a series of linear or cyclic polyols with high chemo- and regioselectivities undermildconditions. Studies of catalytic reactivity and regioselectivity with regard to the C−O bond cleavage with hydrosilanes suggest an importance of the steric environment around the anomeric carboncenter of the
Piers的硼烷[(C 6 F 5)2 BH]原位生成,可促进糖的氢化硅烷化还原,在温和条件下提供一系列具有高化学选择性和区域选择性的线性或环状多元醇。关于用氢硅烷裂解C-O键的催化反应性和区域选择性的研究表明,糖异头碳中心周围的空间环境很重要。
DEOXYKETOHEXOSE ISOMERASE AND METHOD FOR PRODUCING DEOXYHEXOSE AND DERIVATIVE THEREOF USING SAME
申请人:Izumori Ken
公开号:US20100105885A1
公开(公告)日:2010-04-29
Providing 1- or 6-deoxy products corresponding to all of aldohexoses, ketohexoses and sugar alcohols, as based on Deoxy-Izumoring, as well as a method for systematically producing those products. A method for producing deoxyketohexose and a derivative thereof using a deoxyketohexose isomerase derived from
Pseudomonas cichorii
ST-24 (FERM BP-2736), comprising epimerizing 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose at position 3 to produce the individually corresponding 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose as an intended product.
DEOXYKETOHEXOSE ISOMERASE AND METHOD FOR PRODUCING DEOXYKETOHEXOSE AND DERIVATIVE THEREOF USING THE SAME
申请人:National University Corporation Kagawa University
公开号:EP2161332A1
公开(公告)日:2010-03-10
Providing 1- or 6-deoxy products corresponding to all of aldohexoses, ketohexoses and sugar alcohols, as based on Deoxy-Izumoring, as well as a method for systematically producing those products. A method for producing deoxyketohexose and a derivative thereof using a deoxyketohexose isomerase derived from Pseudomonas cichorii ST-24 (FERM BP-2736), comprising epimerizing 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose at position 3 to produce the individually corresponding 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose as an intended product.
Provided herein are SDH substrates that have use as herbicides in treating pre-emergent and post-emergent weed control. The presently-disclosed subject matter includes an herbicide including SDH substrates such as ribitol and a growth inhibitive effective amount of another adjuvant SDH substrate and/or adjuvant. Methods of treating pre-emergent and post-emergent weeds comprising applying the herbicides disclosed herein in an effective amount to suppress weed growth are also provided.
Characterization of 6-deoxy-d-altritol in the cell-wall polysaccharide of Nocardia asteroides R 399
作者:Annie Voiland、Georges Michel
DOI:10.1016/s0008-6215(00)90459-2
日期:1985.9
A polyol, found in the cell-wall of Nocardia asteroides R 399 as a component of a neutral polysaccharide mainly composed of D-arabinose and D-galactose, was identified by mass spectrometry, paper chromatography, thin-layer chromatography, and gas chromatography as 6-deoxy-D-altritol.