CAS: 4254-14-2; (R)-Propane-1,2-Diol

上下游产品

CAS号75-56-9 环氧丙烷 | CAS号20263-26-7 (2R)-1-tritylox... | CAS号17392-83-5 D-乳酸甲酯 | CAS号116-09-6 羟基丙酮 | CAS号60456-23-7 (S)-缩水甘油 | CAS号61597-96-4 (R)-(+)-乳酸异丁酯 | CAS号1369852-93-6 (R)-1-(9H-fluor... | CAS号176097-26-0 (2S)-(-)-3,3,3-... | CAS号87037-69-2 (2R)-2-phenylme... | CAS号27871-49-4 L-乳酸甲酯 | CAS号110-98-5 二丙二醇 | CAS号116-09-6 羟基丙酮 | CAS号1193-11-9 2,2,4-三甲基-1,3-二氧环戊烷 | CAS号15448-47-2 (R)-环氧丙烷 | CAS号10326-41-7 D-乳酸 | CAS号136918-07-5 (2R)-1-[tert-bu... | CAS号113429-86-0 (2R)-1-bromopro... | CAS号592-19-8 acetic acid,2-b...

L-乳酸置于ruthenium-Carbon Composite,氢气体系中,用 水 作为反应溶剂,79.84 °C,8.0 Mpa 条件下,反应 4.0H,以99%的收率获得产物(R)-1,2-丙二醇
参考文献:高活性钌钼氧化物催化剂上乳酸选择性加氢成1,2-丙二醇
标题:高活性钌钼氧化物催化剂上乳酸选择性加氢成1,2-丙二醇
摘要:用的moo少量的ru / C的修改x(茹的moo X / C)增强的催化活性在加氢大号乳酸以形成1,2-丙二醇,并保持高的选择性.基于钌的通过所述优化的ru的量周转频率的moo X / C催化剂(钼/钌的摩尔比= 1:16)是部114H-1在393 K,这是约4倍,超过孺更高/ C.的moo相同的效果x以上的ru得到的moo X /的sio 2,虽然茹的moo X /二氧化硅2显示出比钌的略低活性的moo X / C.茹的moo X / C在393K下获得的95%的高产率在18小时,是适用于各种羧酸,以提供相应的醇以高收率.moo X的改性还抑制了消旋作用,并且在353 K下以高对映体过量获得(S)-1,2-丙二醇.基于动力学分析和表征数据,例如xrd,Tem,Co的体积吸附法,Ftir光谱和x-射线吸收光谱,对钌的moo X / C和ru 的moo X /二氧化硅2提出了催化剂的结构和反应机理.
DOI:10.1002/cssc.201403011

专利信息

专利号:US-2025051339-A1
优先权日:2021-12-15
标题:Methods for the synthesis of complement factor d inhibitors
发明人：HASHIMOTO AKIHIRO
权利人:ALEXION PHARMA INC
摘要:The present disclosure provides methods for the synthesis of complement factor D inhibitors and intermediates thereof. The methods involve subjecting an intermediate in the synthesis of a complement factor D inhibitor to a t-butyl ester deprotection reaction using a weak base.

专利号:US-6540970-B1
优先权日:1999-11-18
标题:Method for the synthesis of molecular sieves
发明人：STROHMAIER KARL G; VAUGHAN DAVID E W
权利人:EXXON MOBIL CHEM PATENTS INC
摘要:The present invention provides a method for the synthesis of MeAPO molecular sieves which includes the following steps: providing a source of alumina, a source of phosphorus, water, and a template suitable for forming a MeAPO molecular sieve; providing a source of metal (Me) including metal particles, the metal particles measuring, in their largest dimension, equal to or less than five nanometers; providing a water soluble organic solvent capable of solubilizing the source of metal; forming a synthesis mixture from the source of alumina, the source of phosphorus, the water, the template, the source of metal, and the solvent; and forming a MeAPO molecular sieve from the synthesis mixture.

专利号:US-4902817-A
优先权日:1987-09-17
标 题 :Process for the synthesis of alpha n alkylated amino acids and esters thereof, application to the synthesis of carboxyalkyl dipeptides
发明人：VINCENT MICHEL; BALIARDA JEAN; MARCHAND BERNARD; REMOND GEORGES
权利人:ADIR
摘要:Stereoselective process for the industrial synthesis of compounds of formula (I): ##STR1## where R 1 is linear or branched lower alkyl with 1 to 6 carbon atoms, n R 2 is a linear or branched lower alkyl with 1 to 4 carbon atoms, n employing inexpensive starting materials and obtaining optimum yields. n Application to the synthesis of carboxyalkyl dipeptides.

专利号:US-9040739-B2
优先权日:2012-06-18
标题 :Catalyst and method for synthesis of lactic acid and its derivatives
发明人：ZHOU XIAOPING; BI RUI
权利人:ZHOU XIAOPING; BI RUI; MICROVAST POWER SYSTEMS CO LTD
摘要:A catalyst for synthesis of lactic acid and it derivatives is provided. The catalyst includes SnY2.mH 2 O and at least one of NH 4 X or quaternary ammonium salts, wherein X and Y are selected from F—, Cl—, Br—, I—, CH 3 SO 3 —, C 6 H 5 SO 3 —, CH 3 C 6 H 4 SO 3 — or CN—, m represents an integer of 1 to 15. A method for synthesis of lactic acid and it derivatives with the above catalyst is also provided. By using the above catalyst and method, it is capable of converting carbohydrate-containing raw material to lactic acid and its derivatives directly in a more efficient and economical way.

专利号:US-4174345-A
优先权日:1978-08-01
标题:Synthesis of steroids
发明人：KAISER EMIL T
权利人:KAISER EMIL T
摘要:In the synthesis of sterols wherein methoxyethoxymethyl groups in an ether linkage are attached to the nucleus of the sterol to protect the sterol nucleus during other steps of the synthesis and the sterols are thereafter treated to remove the methoxyethoxymethyl groups and set free the hydroxyl groups, the improvement in which the sterols being treated with zinc bromide are held in a methylene chloride solution containing a small amount of an aliphatic alcohol having from 1 to 6 carbon atoms.

专利号:US-4477594-A
优先权日:1982-12-16
标题 :Process for the synthesis of aliphatic alcohol-containing mixtures
发明人：GREENE MARVIN I; GELBEIN ABRAHAM P
权利人:CHEM SYSTEMS
摘要:A process for the synthesis of mixtures which include saturated aliphatic alcohols is disclosed. In the first step of the process, the first catalyst activation stage, a catalyst, which comprises the oxides of copper, zinc, aluminum, potassium and one or two additional metals selected from the group consisting of chromium, magnesium, cerium, cobalt, thorium and lanthanum, is partially activated. In this step, a reducing gas stream, which includes hydrogen and at least one inert gas, flows past the catalyst at a space velocity of up to 5,000 liters (STP) per hour, per kilogram of catalyst. The partially activated catalyst is then subjected to the second step of the process, second-stage catalyst activation. In this step, the catalyst is contacted by an activation gas stream comprising hydrogen and carbon monoxide present in a volume ratio of 0.5:1 and 4:1, respectively, at a temperature of 200 DEG to 450 DEG C. and a pressure of between 35 and 200 atmospheres. The activation gas flows at a space velocity of from 1,000 to 20,000 liters (STP) per hour, per kilogram of catalyst. Second-stage activation continues until the catalyst is contacted with at least 500,000 liters (STP) of activation gas per kilogram of catalyst. The fully activated catalyst, in the third step of the process, contacts a synthesis gas stream comprising hydrogen and carbon monoxide.