Reactions of Methyl and Ethoxy Free Radicals in Chlorohydrocarbons: A Comparative Study of the Use of Diacetyl Peroxide and Diethylperoxydicarbonate as Agents for Linking Alpha Carbon to Alpha Carbon in Some Chloro-Substituted Aralkyls1
Direct preparation of benzylic manganese reagents from benzyl halides, sulfonates, and phosphates and their reactions: applications in organic synthesis
作者:YoungSung Suh、Jun-sik Lee、Seoung-Hoi Kim、Reuben D Rieke
DOI:10.1016/s0022-328x(03)00500-x
日期:2003.11
The use of highly active manganese (Mn)*, prepared by the Rieke method, was investigated for the direct preparation of benzylic manganese reagents. The oxidative addition of the highly active manganese to benzylic halides was easily completed under mild conditions. Moreover, benzylic manganese sulfonates and phosphates were prepared by direct oxidative addition of Mn* to the carbon–oxygen bonds of
Silylated polycarbonate polymers, method of making, and articles
申请人:Lens Jan Pleun
公开号:US20080306294A1
公开(公告)日:2008-12-11
A silylated dihydroxy aromatic compound of the formula (1a);
wherein G
a
and G
b
are each independently C
1-12
alkyl, —OSi(C
1-12
alkyl)
3
, C
1-12
arylalkyl, or —OSi(C
1-12
arylalkyl)
3
; Z
a
and Z
b
are each independently a straight or branched C
2-18
alkylene, a C
8-18
arylalkylene, or a C
8-18
alkylarylene, X
a
is a direct bond, a heteroatom-containing group, or a C
1-18
organic group, and r and s are each independently 1 or 2 is disclosed.
Nondirecting Group <i>sp</i>
<sup>3</sup>
C−H Activation for Synthesis of Bibenzyls <i>via</i>
Homo-coupling as Catalyzed by Reduced Graphene Oxide Supported PtPd@Pt Porous Nanospheres
Pd‐based nanocatalyst for directing the inactivated sp3 C−H coupling has been scarcely explored. This work reported the formation of symmetrical C−C bonds from the inactivated sp3 C−H bonds catalyzed by employing reduced graphene oxide supported PtPd@Pt porous nanospheres. The reaction of sp3 C−H activation proceeded under mild conditions without any solvent, ligand or directing group. It is a higher atom‐
很少探索使用非均相双金属钯基纳米催化剂指导失活的sp 3 C-H偶联。这项工作报道了通过使用还原性氧化石墨烯负载的PtPd @ Pt多孔纳米球催化的灭活的sp 3 C-H键形成对称的C-C键。sp 3 C H活化反应在温和条件下进行,没有任何溶剂,配体或指导基团。在合成具有各种官能团(例如芳基,烷基,甲氧基,卤素,酯和吡啶基)的联苄中,开发多相催化剂是一种更高的原子,步骤和成本效益策略。
INDANE BISPHENOLS, POLYMERS DERIVED THEREFROM, AND METHODS OF USE THEREOF
申请人:Schultz Hume Laura G.
公开号:US20140061533A1
公开(公告)日:2014-03-06
Disclosed herein are indane bisphenol monomer units, and polymers derived from such monomer units. Also disclosed herein are blends including such polymers, articles made from such polymers and blends, methods of using such monomers, polymers, and blends, and processes for preparing such monomers, polymers, and blends.
Stabilized thermoplastic composition, method of making, and articles formed therefrom
申请人:Glasgow Katherine
公开号:US20070082989A1
公开(公告)日:2007-04-12
A thermoplastic composition comprises a polycarbonate, an ionizing radiation stabilizing additive, and a poly-substituted aromatic compound of formula:
wherein X is an aryl group; Y is a non-hydrogen substituent group, a is 1 to 4, b is 0 to 4, a+b is less than or equal to 4, and c is 0 or 1; and wherein the amounts and identities of the polycarbonate, ionizing radiation stabilizing additive, and poly-substituted aromatic compound are selected such that a molded article having a thickness of 3.18 millimeters and comprising the thermoplastic composition has, after exposure to gamma radiation at 83 kGy and when measured according to ASTM D1925-70, an increase in yellowness index (dYI) of less than or equal to 50, when compared to the unexposed thermoplastic composition.