of α‐methylene‐γ‐lactones through the palladium(II)‐catalyzed lactonization of homoallylic alcohols with alkynamides has been reported. The hydroxyl group in the terminal olefins cooperates with the amide in alkynamides to promote the cyclization by suppressing the β‐H elimination. This process provides a route to construct naturally occurring biologically multifunctional α‐methylene‐γ‐lactones.
Ti/Pd Bimetallic Systems for the Efficient Allylation of Carbonyl Compounds and Homocoupling Reactions
作者:Alba Millán、Araceli G. Campaña、Btissam Bazdi、Delia Miguel、Luis Álvarez de Cienfuegos、Antonio M. Echavarren、Juan M. Cuerva
DOI:10.1002/chem.201003315
日期:2011.3.28
The allylation, crotylation and prenylation of aldehydes and ketones with stable and easily handled allylic carbonates is promoted by a Ti/Pd catalytic system. This Ti/Pd bimetallic system is especially convenient for the allylation of ketones, which are infrequent substrates in other related protocols, and can be carried out intramolecularly to yield five‐ and six‐membered cyclic products with good
Ti / Pd催化体系可促进醛和酮与稳定且易于处理的烯丙基碳酸酯的烯丙基化,丁酰化和烯丙基化。这种Ti / Pd双金属体系特别适合于酮的烯丙基化,酮是其他相关规程中不常见的底物,并且可以在分子内进行生产,从而产生具有良好立体选择性的五元和六元环状产物。此外,Ti / Pd介导的还原反应和Würtz型二聚反应可以很容易地从碳酸烯丙酯和羧酸酯中进行。
Salt suitable for an acid generator and a chemically amplified resist composition containing the same
申请人:Harada Yukako
公开号:US20070078269A1
公开(公告)日:2007-04-05
The present invention provides a salt of the formula (I):
wherein ring Y represents monocyclic or polycyclic hydrocarbon group having 3 to 30 carbon atoms, in which one —CH
2
— group is substituted with —COO— group, and at least one hydrogen atom in the monocyclic or polycyclic hydrocarbon group may optionally be substituted with alkyl group having 1 to 6 carbon atom, alkoxy group having 1 to 6 carbon atom, perfluoroalkyl group having 1 to 4 carbon atoms, hydroxyalkyl group having 1 to 6 carbon atoms, hydroxyl group or cyano group; Q
1
and Q
2
each independently represent fluorine atom or perfluoroalkyl group having 1 to 6 carbon atoms; A
+
represents organic counter ion; and n shows an integer of 0 to 12.
The present invention also provides a chemically amplified resist composition comprising the salt of the formula (I).
SALT AND PHOTORESIST COMPOSITION CONTAINING THE SAME
申请人:ICHIKAWA Koji
公开号:US20100304293A1
公开(公告)日:2010-12-02
A salt represented by the formula (a):
wherein Q
1
and Q
2
each independently represent a fluorine atom etc.,
X
1
represents a single bond etc.,
X
2
represents a single bond etc.,
Y
1
represents a C3-C6 alicyclic hydrocarbon group etc., with the proviso that —X
2
—Y
1
group has one or more fluorine atoms, and
Z
+
represents an organic counter cation, and a photoresist composition comprising the salt represented by the formula (a) and a resin comprising a structural unit having an acid-labile group and being insoluble or poorly soluble in an aqueous alkali solution but becoming soluble in an aqueous alkali solution by the action of an acid.
Salt suitable for an acid generator and a chemically amplified positive resist composition containing the same
申请人:Shigematsu Junji
公开号:US20080086014A1
公开(公告)日:2008-04-10
The present invention provides a salt represented by the formula (I):
wherein X represents a C3-C30 divalent group containing at least one divalent alicyclic hydrocarbon group, and at least one —CH
2
— in the C3-C30 divalent group may be substituted with —O— or —CO—,
Y represents a C3-C30 cyclic hydrocarbon group which may be substituted with at least one group selected from a C1-C6 alkoxy group, a C1-C4 perfluoroalkyl group, a C1-C6 hydroxyalkyl group, a hydroxyl group and a cyano group, and at least one —CH
2
— in the C3-C30 cyclic hydrocarbon group may be substituted with —O— or —CO—,
Q
1
and Q
2
each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A
+
represents an organic counter ion.