Pivaloyl-directed regioselective syntheses of 2,3,6-trioxygenated benzamides: phenolic metabolites of remoxipride
摘要:
The regioselective syntheses of (S)-5-bromo-2,6-dimethoxy-N-[(1-ethyl-2-pyrrolidinyl)methyl]-3-hydroxybenzamide (2) and (S)-5-bromo-N-[(1-ethyl-2-pyrrolidinyl)methyl]-3-hydroxy-6-methoxy-salicylamide (3) from 2,6-dimethoxybenzoic acid and 4-methoxycatechol are described. The latter compound was protected and ortho-lithiated to introduce the carboxyl function in a regioselective manner. Regiocontrol in bromination and demethylation was achieved by introduction of a bulky pivaloyl group. This strategy also enabled the use of a common intermediate as an alternative synthesis of the catechol 3.
Pivaloyl-directed regioselective syntheses of 2,3,6-trioxygenated benzamides: phenolic metabolites of remoxipride
摘要:
The regioselective syntheses of (S)-5-bromo-2,6-dimethoxy-N-[(1-ethyl-2-pyrrolidinyl)methyl]-3-hydroxybenzamide (2) and (S)-5-bromo-N-[(1-ethyl-2-pyrrolidinyl)methyl]-3-hydroxy-6-methoxy-salicylamide (3) from 2,6-dimethoxybenzoic acid and 4-methoxycatechol are described. The latter compound was protected and ortho-lithiated to introduce the carboxyl function in a regioselective manner. Regiocontrol in bromination and demethylation was achieved by introduction of a bulky pivaloyl group. This strategy also enabled the use of a common intermediate as an alternative synthesis of the catechol 3.
RESIST COMPOSITION, METHOD OF FORMING RESIST PATTERN, AND COMPOUND
申请人:TOKYO OHKA KOGYO CO., LTD.
公开号:US20200183273A1
公开(公告)日:2020-06-11
A resist composition including a base material component (A) whose solubility in a developing solution is changed due to the action of an acid, and a compound (D0) formed of an anion moiety and a cation moiety which is represented by Formula (d0), in which the cation moiety of the compound (D0) has a Log P value of less than 7.7. In the formula, M
m+
represents an m-valent organic cation, R
d0
represents a substituent, p represents an integer of 0 to 3, q represents an integer of 0 to 3, n represents an integer of 2 or greater, and a relationship of “n+p≤(q×2)+5” is satisfied.
Late transition metal catalysts for olefin polymerization and oligomerization
申请人:Cherkasov Kuzunich Vladimir
公开号:US20060047094A1
公开(公告)日:2006-03-02
This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.
Late transition metal catalysts for olefin oligomerizations
申请人:Zhao Baiyi
公开号:US20050003955A1
公开(公告)日:2005-01-06
A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear α-olefins.
LATE TRANSITION METAL CATALYSTS FOR OLEFIN POLYMERIZATION AND OLIGOMERIZATION
申请人:ExxonMobil Chemical Patents Inc.
公开号:EP1521758A1
公开(公告)日:2005-04-13
RESIST COMPOSITION AND METHOD OF FORMING RESIST PATTERN
申请人:TOKYO OHKA KOGYO CO., LTD.
公开号:US20210149302A1
公开(公告)日:2021-05-20
A resist composition including a compound (D0) represented by general formula (d0) and a polymeric compound (A10) having a structural unit (a0) derived from a compound represented by general formula (a0-1) shown below (in formula (d0), n represents an integer of 2 or more; in formula (a0-1), W
1
represents a polymerizable group-containing group; C
t
represents a tertiary carbon atom, and the α-position of C
t
is a carbon atom which constitutes a carbon-carbon unsaturated bond; R
11
represents an aromatic hydrocarbon group which may have a substituent, or a chain hydrocarbon group; R
12
and R
13
each independently represents a chain hydrocarbon group, or R
12
and R
13
are mutually bonded to form a cyclic group