503-48-0Relevant articles and documents
MANUFACTURING METHOD OF β-HYDROXYLACTONE (METH)ACRYLIC ACID ESTER
-
Paragraph 0045; 0049-0051, (2020/01/23)
PROBLEM TO BE SOLVED: To provide a method capable of manufacturing (meth)acrylic acid ester of β-hydroxylactone at high yield with almost no side reaction. SOLUTION: The problem is solved by a manufacturing method of β-hydroxylactone (meth)acrylic acid ester for providing corresponding (meth)acrylic acid ester by reacting specific β-hydroxylactone (B) and at least one kind of acid anhydride (C) selected from (meth)acrylic acid anhydride (C1) and anhydride of (meth)acrylic acid and carboxylic acid other than the (meth)acrylic acid (C2) in presence of a specific Lewis acid catalyst (A). SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
METHODS OF FORMING DIOL COMPOUNDS
-
Paragraph 0094, (2017/11/06)
Methods of forming a C4 to C7 diol compound, the methods including a first step of reacting a C4 to C7 dicarboxylic acid with hydrogen (H2) gas on a first heterogeneous catalyst at a first temperature and a first pressure to form a C4 to C7 lactone; and a subsequent step of reacting the lactone with hydrogen (H2) gas on a second heterogeneous catalyst at a second temperature and a second pressure, wherein the second temperature is lower than the first temperature. Also disclosed are methods of forming a solvent, the methods including reacting a C4 to C7 dicarboxylic acid with hydrogen (H2) gas on a first heterogeneous catalyst at a first temperature and a first pressure to form a solvent. Further disclosed herein are methods that include reacting mevalonolactone with hydrogen (H2) gas on a second heterogeneous catalyst at a second temperature and a second pressure to form a diol compound.
Efficient and Selective Cu/Nitroxyl-Catalyzed Methods for Aerobic Oxidative Lactonization of Diols
Xie, Xiaomin,Stahl, Shannon S.
supporting information, p. 3767 - 3770 (2015/04/14)
Cu/nitroxyl catalysts have been identified that promote highly efficient and selective aerobic oxidative lactonization of diols under mild reaction conditions using ambient air as the oxidant. The chemo- and regioselectivity of the reaction may be tuned by changing the identity of the nitroxyl cocatalyst. A Cu/ABNO catalyst system (ABNO = 9-azabicyclo[3.3.1]nonan-N-oxyl) shows excellent reactivity with symmetrical diols and hindered unsymmetrical diols, whereas a Cu/TEMPO catalyst system (TEMPO = 2,2,6,6-tetramethyl-1-piperidinyl-N-oxyl) displays excellent chemo- and regioselectivity for the oxidation of less hindered unsymmetrical diols. These catalyst systems are compatible with all classes of alcohols (benzylic, allylic, aliphatic), mediate efficient lactonization of 1,4-, 1,5-, and some 1,6-diols, and tolerate diverse functional groups, including alkenes, heterocycles, and other heteroatom-containing groups.
