The ruthenium pincer-catalyzed synthesis of γ-butyrolactones from 1,2-diols and malonates using borrowing-hydrogen methodology is reported.
本文报道了使用借氢方法,通过钌夹钳催化从1,2-二醇和丙二酸酯合成γ-丁内酯的过程。
Cobalt carbonyl catalyzed reactions of esters and lactones with hydrosilane and carbon monoxide. A novel synthetic method for the introduction of the siloxymethylidene group
monoxide took place except for bridgehead alkyl acetates. The mechanism of the catalytic reaction has been proposed, and the importance of the silycobalt carbonyl, R/sub 3/SiCO(CO)/sub 4/, as the key catalyst species has been suggested. The high affinity of the silicon in R/sub 3/SiCo(CO)/sub 4/ toward the oxygenatom in the ester is suggested to be the driving force for the formation of alkylcobalt carbonyls
6-Cyclylmethyl- and 6-alkylmethyl-substituted pyrazolepyrimidines
申请人:Hendrix Martin
公开号:US20070105876A1
公开(公告)日:2007-05-10
The invention relates to novel 6-cyclylmethyl- and 6-alkylmethyl-substituted pyrazolopyrimidines, process for their preparation and their use for producing medicaments for improving perception, concentration, learning and/or memory.
PHOTOSENSITIVE COMPOSITION, PATTERN FORMING METHOD USING THE PHOTOSENSITIVE COMPOSITION AND COMPOUND FOR USE IN THE PHOTOSENSITIVE COMPOSITION
申请人:Wada Kenji
公开号:US20100233617A1
公开(公告)日:2010-09-16
A photosensitive composition includes: (A) a resin containing a repeating unit corresponding to a compound represented by the following formula (I); the resin being capable of producing an acid group upon irradiation with an actinic ray or radiation:
Z-A-X—B—R (I)
wherein Z represents a group capable of becoming an acid group resulting from leaving of a cation upon irradiation with an actinic ray or radiation; A represents an alkylene group; X represents a single bond or a heteroatom-containing divalent linking group; B represents a single bond, an oxygen atom or —N(Rx)-; Rx represents a hydrogen atom or a monovalent organic group; R represents a monovalent organic group substituted by Y; when B represents —N(Rx)-, R and Rx may combine with each other to form a ring; and Y represents a polymerizable group.
SALT AND PHOTORESIST COMPOSITION CONTAINING THE SAME
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20170247323A1
公开(公告)日:2017-08-31
A salt having a group represented by the formula (aa):
wherein X
a
and X
b
independently each represent an oxygen atom or a sulfur atom,
the ring W represents a C3-C36 heterocyclic ring which has an ester bond or a thioester bond, said heterocyclic ring optionally further having an oxygen atom, a sulfur atom, a carbonyl group or a sulfonyl group each by which a methylene group has been replaced, and said heterocycilic ring optionally having a hydroxyl group, a cyano group, a carboxyl group, a C1-C12 alkyl group, a C1-C12 alkoxy group, a C2-C13 alkoxycarbonyl group, a C2-C13 acyl group, a C2-C13 acyloxy group, a C3-C12 alicyclic hydrocarbon group, a C6-C10 aromatic hydrocarbon group or any combination of these groups each by which a hydrogen atom has been replaced, and
* represents a binding position.