Reductive Cyclopropanations Catalyzed by Dinuclear Nickel Complexes
作者:You-Yun Zhou、Christopher Uyeda
DOI:10.1002/anie.201511271
日期:2016.2.24
Dinuclear Ni complexes supported by naphthyridine‐diimine (NDI) ligands catalyze the reductive cyclopropanation of alkenes with CH2Cl2 as the methylene source. The use of mild terminal reductants (Zn or Et2Zn) confers significant functional‐group tolerance, and the catalyst accommodates structurally and electronically diverse alkenes. Mononickel catalysts bearing related N chelates afford comparatively
Synthesis and structural characterization of functionalized cyclotetrasiloxane rings [4-RC6H4Si(O)OR′]4 (R=Cl, Br, CHCH2, CH2Cl; R′=Na, SiMe3) as scaffolds for the synthesis of models of a silica bound monolayer of fluorescent or second order NLO active organic chromophores
the aromatic ring, like [4-RC6H4Si(O)ONa]4 and the corresponding (trimethylsiloxy)cyclotetrasiloxanes [4-RC6H4Si(O)OSiMe3]4 (R = Cl, Br, CHCH2, CH2Cl), were prepared as scaffolds for anchoring second order NLO active or fluorescent organic chromophores. Such cyclic molecules can be regarded as 2D models reproducing supramolecular organizations as monolayers. The crystalline structures of some of the
在芳环对位适当官能化的一系列芳基环四硅氧烷酸钠,如[4-RC 6 H 4 Si(O)ONa] 4和相应的(三甲基甲硅烷氧基)环四硅氧烷[4-RC 6 H 4 Si(O)OSiMe 3 ] 4(R = Cl,Br,CHCH 2,CH 2将C1)制备为用于锚定二阶NLO活性或荧光有机生色团的支架。这样的环状分子可以被认为是将超分子组织再现为单层的2D模型。通过低温下的单晶X射线衍射分析表征了这项工作中合成的某些化合物的晶体结构。所有化合物都具有在清一色苯环顺排列相对于所述tetrasiloxane周期,其在三甲基甲硅烷衍生物,是相当平坦的。在这些后面的化合物中,苯环几乎彼此平行,尽管不垂直于该环。
Cp*Ir‐Catalyzed C−H Arylation of 2‐Pyridones and 1‐Isoquinolinones with Arylsilanes
作者:Tongxu Su、Heng Xu、Yi Dong
DOI:10.1002/adsc.202400029
日期:——
A new Cp*Ir‐catalyzed C–H arylation of 1‐isoquinolinone and 2 pyridones to afford 6‐phenylpyridin‐2(1H)‐ones and 3‐phenylisoquinolin‐1(2H)‐ones by using arylsilanes is described in this paper. This protocol offers significant synthetic advantages, including mild reaction conditions, good functional group tolerance, a wide range of substrate applicability, and a concise approach to the core structure
Efficient syntheses of new phosphonate terminated trialcoxysilane derived oligoarylenevinylene fluorophores
作者:Ce´line Carbonneau、Richard Frantz、Jean-Olivier Durand、Ge´rard F. Lanneau、Robert J.P. Corriu
DOI:10.1016/s0040-4039(99)01140-5
日期:1999.8
The syntheses of new molecules derived from oligoarylenevinylene, possessing two assembling functionalities (trialcoxysilane and phosphonate) are described. Two successive Heck reactions were carried out to afford the highly functionalized compounds 3a-g in average overall yields. The optical properties of 3a-g were then studied. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Organosilane compound and organosilica obtained therefrom
申请人:Mizoshita Norihiro
公开号:US20080227939A1
公开(公告)日:2008-09-18
Provided is an organosilane compound expressed by any one of the following general formulae (1) to (7):
(wherein: Ar represents a phenylene group or the like; R
1
represents a hydrogen atom or the like; R
2
to R
8
each represent a methyl group or the like; n represents an integer in a range from 0 to 2; m represents an integer of 1 or 2; L represents a single bond or the like; X represents a hydrogen atom or the like; and Y represents a hydrogen atom or the like).