Palladium-catalyzed desulfitative hydroarylation of alkynes with sodium sulfinates
作者:Saiwen Liu、Yang Bai、Xiangxiang Cao、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c3cc43723j
日期:——
A palladium-catalyzeddesulfitative hydroarylation of alkynes with arylsulfinicacid sodium salts is described. The reaction showed good regio- and stereoselectivity, and afforded the hydroarylation products in good yields. Various functional groups were well tolerated under the optimized reaction conditions.
Triarylalkenes from the site-selective reductive cross-coupling of benzophenones and aldehydes
作者:Anna I. Arkhypchuk、Nicolas D'Imperio、Sascha Ott
DOI:10.1039/c9cc02972a
日期:——
PhP(Li)TMS converts benzophenones to phosphaalkenes which upon activation under oxidizing, basic conditions react with aromatic aldehydes under the formation of triarylalkenes. The one-pot reaction omits transition metals, proceeds at room temperature and precludes the formation of any homo-coupling products. Systematic substrate variations reveal reactivity patterns that are useful for the identification
Exploratory Studies on the Reaction Between Iodoarenes and Acetylenes: One-pot, Pd-[Bmim][BF4] Catalyzed Preparation of Trianisylethylene
作者:José C. Barros、Andrea L. F. Souza、Joaquim F. M. da Silva、O. A. C. Antunes
DOI:10.1007/s10562-011-0549-7
日期:2011.4
The reaction between iodoarenes and acetylenes mediated by palladium was studied, showing selectivity changes based on the nature of the substituent. A new, phosphine-, copper-, and amine-free methodology was developed, in which the synthesis of trianisylethylene from 4-iodoanisole and trimethylsilylacetylene was promoted presumably by an N-heterocyclic-carbene derived from an ionic liquid and a palladium salt, using ethanol as the hydrogen source.
METHODS, COMPOSITIONS, AND APPARATUSES FOR FORMING MACROCYCLIC COMPOUNDS
申请人:Johnson, Thomas E.
公开号:EP1716153B1
公开(公告)日:2013-10-09
Methods, compositions, and apparatuses for forming macrocyclic compounds
申请人:Johnson E. Thomas
公开号:US20070217965A1
公开(公告)日:2007-09-20
This invention relates to methods, compositions, and apparatuses for producing macrocyclic compounds. First, one or more reactants are provided in a reaction medium, which are capable of forming the macrocyclic compound through a desired reaction pathway that includes at least cyclization, and which are further capable of forming undesired oligomers through a undesired reaction pathway that includes undesirable oligomerization. Oligomerization of such reactions in the reaction medium is modulated to reduce formation of undesired oligomers and/or to reduce separation of the undesired oligomers from the reaction medium, relative to a corresponding unmodulated oligomerization reaction, thereby maximizing yields of the macrocyclic compound. The macrocyclic compound so formed is then recovered from the reaction medium. Preferably, the macrocyclic compound spontaneously separates from the reaction medium via phase separation. More preferably, the macrocyclic compound spontaneous precipitates from the reaction medium and therefore can be easily recovered by simple filtration.