Mild and Efficient Deprotection of Acetal-Type Protecting Groups of Hydroxyl Functions by Triethylsilyl Triflate — 2,4,6-Collidine Combination
摘要:
Deprotection of acetal-type protecting groups of hydroxyl functions has been studied in detail. The treatment of alcohol derivatives protected by acetal-type protecting groups with TESOTf-2,4,6-collidine followed by H(2)O-treatment produces the corresponding hydroxyl compounds in good yields. The characteristic features of the method are very mild and chemoselective, and acid-labile functional groups can tolerate these conditions.
Mild and Efficient Deprotection of Acetal-Type Protecting Groups of Hydroxyl Functions by Triethylsilyl Triflate — 2,4,6-Collidine Combination
摘要:
Deprotection of acetal-type protecting groups of hydroxyl functions has been studied in detail. The treatment of alcohol derivatives protected by acetal-type protecting groups with TESOTf-2,4,6-collidine followed by H(2)O-treatment produces the corresponding hydroxyl compounds in good yields. The characteristic features of the method are very mild and chemoselective, and acid-labile functional groups can tolerate these conditions.
Decarboxylative Acetoxylation of Aliphatic Carboxylic Acids
作者:Sameera Senaweera、Kaitie C. Cartwright、Jon A. Tunge
DOI:10.1021/acs.joc.9b02092
日期:2019.10.4
with regioselectivity. An alternative approach is to use ubiquitous carboxylic acids as starting materials and perform a decarboxylative coupling. Herein, we report conditions for a photocatalytic decarboxylative C-O bond formation reaction that provides rapid and facile access to the corresponding acetoxylated products. Mechanistic investigations suggest that the reaction operates via oxidation of the
RESIST COMPOSITION CONTAINING NOVEL SULFONIUM COMPOUND, PATTERN-FORMING METHOD USING THE RESIST COMPOSITION, AND NOVEL SULFONIUM COMPOUND
申请人:KAMIMURA Sou
公开号:US20090042124A1
公开(公告)日:2009-02-12
A resist composition includes (A) a compound represented by the following formula (I):
wherein each of R
1
to R
13
independently represents a hydrogen atom or a substituent, provided that at least one of R
1
to R
13
is a substituent containing an alcoholic hydroxyl group; Z represents a single bond or a divalent linking group; and X
−
represents an anion containing a proton acceptor functional group.
CHEMICAL AMPLIFICATION RESIST COMPOSITION, AND MOLD PREPARATION METHOD AND RESIST FILM USING THE SAME
申请人:Fujimori Toru
公开号:US20120006788A1
公开(公告)日:2012-01-12
A chemical amplification resist composition that is used for preparation of a mold, and a mold preparation method and a resist film each using the composition are provided.
提供一种用于制备模具的化学放大型光阻组合物,以及使用该组合物的模具制备方法和光阻膜。
Holographic recording medium
申请人:Kabushiki Kaisha Toshiba
公开号:EP1939686A1
公开(公告)日:2008-07-02
A holographic recording medium (12) is provided, which includes a recording layer (19) comprising a three-dimensional cross-linking polymer matrix, a radical polymeric compound, and a photo-radical polymerization initiator. The three-dimensional cross-linking polymer matrix is represented by the following general formula (1):
where m is an integer ranging from 3 to 16.
提供了一种全息记录介质(12),它包括一个记录层(19),记录层由三维交联聚合物基体、自由基聚合物化合物和光致发光聚合引发剂组成。三维交联聚合物基质由以下通式(1)表示:
其中 m 为 3 至 16 的整数。
Halogen-substituierte Verbindungen als Pestizide
申请人:Bayer CropScience AG
公开号:EP2184273A1
公开(公告)日:2010-05-12
Die Erfindung betrifft Verbindungen der allgemeinen Formel (I),
in welcher die Reste A1, A2, A3, A4, Lm, Q, R1, T und T die in der Beschreibung angegebene Bedeutung besitzen sowie die Verwendung der Verbindungen zur Bekämpfung von tierischen Schädlingen. Ferner betrifft die Erfindung Verfahren und Intermediate zur Herstellung der Verbindungen gemäß Formel (I).
本发明涉及通式 (I) 的化合物、
其中自由基 A1、A2、A3、A4、Lm、Q、R1、T 和 T 的含义,以及该化合物在防治动物害虫方面的用途。本发明还涉及根据式(I)制备化合物的工艺和中间体。