Type II Flavin-Containing Monooxygenases: A New Class of Biocatalysts that Harbors Baeyer-Villiger Monooxygenases with a Relaxed Coenzyme Specificity
作者:Anette Riebel、Michael J. Fink、Marko D. Mihovilovic、Marco W. Fraaije
DOI:10.1002/cctc.201300550
日期:2014.4
type II FMOs follow a catalytic mechanism similar to that of other class B flavoprotein monooxygenases. A set of cyclobutanones and cyclohexanones were used to probe the regio‐ and enantioselectivity of all three recombinant monooxygenases. The biocatalysts readily accepted small cyclic ketones, which enabled the conversion of previously poorly accepted substrates by other monooxygenases (especially
Metal-catalysed enantiospecific aerobic oxidation of cyclobutanones
作者:Carsten Bolm、Gunther Schlingloff
DOI:10.1039/c39950001247
日期:——
The metal-catalysed aerobic oxidation of substituted racemic cyclobutanones provides optically active lactones with enantioselectivities of up to 95% e.e.
金属催化的有氧氧化取代的外消旋环丁酮可以获得光学活性的内酯,其对映选择性高达95% e.e.
Microbial Baeyer−Villiger Oxidation: Stereopreference and Substrate Acceptance of Cyclohexanone Monooxygenase Mutants Prepared by Directed Evolution
作者:Marko D. Mihovilovic、Florian Rudroff、Alexander Winninger、Toni Schneider、Frank Schulz、Manfred T. Reetz
DOI:10.1021/ol0601040
日期:2006.3.1
array of random mutants of cyclohexanonemonooxygenase (CHMO) from Acinetobacter sp. NCIMB 9871 was screened against a library of structurally diverse ketones for modifications in the substrate acceptance profile and stereopreference of the enzymatic Baeyer-Villiger biooxidation. While the set of mutant biocatalysts was initially evolved for the enantiocomplementary oxidation of 4-hydroxycyclohexanone
COMPOSITION FOR FORMING SILICON-CONTAINING RESIST UNDERLAYER FILM HAVING CYCLIC DIESTER GROUP
申请人:NISSAN CHEMICAL INDUSTRIES, LTD.
公开号:US20150322212A1
公开(公告)日:2015-11-12
A resist underlayer film that can be used as a hardmask. A resist underlayer film forming composition for lithography, includes: as a silane, a hydrolyzable silane, a hydrolysis product thereof, or a hydrolysis-condensation product thereof, wherein the hydrolyzable silane includes a hydrolyzable silane of Formula (1) or a hydrolyzable silane containing a combination of a hydrolyzable silane of Formula (1) with a hydrolyzable silane of Formula (2) in a content of less than 50% by mole in all silanes;
Formula (1): R
1
a
R
2
b
Si(R
3
)
4-(a+b)
wherein R
1
is an organic group containing Formula (1-1), Formula (1-2), or Formula (1-3):
a is 1 and b is an integer of 0 to 2, where a+b is an integer of 1 to 3;
Formula (2): R
4
a
R
5
b
Si(R
6
)
4-(a+b)
wherein, R
4
is an organic group containing Formula (2-1), Formula (2-2), or Formula (2-3):
a is 1 and b is an integer of 0 to 2, where a+b is an integer of 1 to 3.
Resist underlayer film forming composition containing silicon having ester group
申请人:NISSAN CHEMICAL INDUSTRIES, LTD.
公开号:US10372039B2
公开(公告)日:2019-08-06
A resist underlayer film forming composition for lithography for a resist underlayer film usable as a hardmask. A resist underlayer film forming composition for lithography, including: as a silane, a hydrolyzable silane, a hydrolysis product thereof, or a hydrolysis-condensation product thereof, wherein the hydrolyzable silane includes a hydrolyzable silane of Formula (1) or a hydrolyzable silane containing a combination of a hydrolyzable silane of Formula (1) with a hydrolyzable silane of Formula (2), and a content of the hydrolyzable silane of Formula (1) or the hydrolyzable silane containing a combination of a hydrolyzable silane of Formula (1) with a hydrolyzable silane of Formula (2) in all silanes is less than 50% by mole,
R1aR2bSi(R3)4−(a+b) Formula (1)
R4a1R5b1Si(R6)4−(a1+b1) Formula (2).