- An expedient synthesis of highly functionalized 1,3-dienes by employing cyclopropenes asC4units
-
An efficient method has been described to synthesize dicarbonyl functionalized 1,3-dienes by cleaving the CC bond of enaminones with cyclopropenes in the presence of a rhodium catalyst. The acetate-substituted cyclopropenes are judiciously chosen as standardC4units of 1,3-diene precursors. The reactions are believed to undergo a unique cutting and insertion process, involving a CC bond cleavage of the enaminone and insertion of a newC(sp2) source with the formation of two C-C single bonds. A broad range of substrates can be used to synthesize the corresponding 1,3-dienes under very mild reaction conditions, including low catalyst-loading, ambient temperature, and a neutral reaction solvent.
- Jiang, Chengzhou,Wu, Jiamin,Han, Jiabin,Chen, Kai,Qian, Yang,Zhang, Zhengyu,Jiang, Yaojia
-
supporting information
p. 5710 - 5713
(2021/06/16)
-
- Harnessing Stereospecific Z-Enamides through Silver-Free Cp?Rh(III) Catalysis by Using Isoxazoles as Masked Electrophiles
-
The stereospecific synthesis of Z-enamides is described in this paper. For the first time, isoxazoles have been employed as electrophiles in C-H functionalization to afford thermodynamically less stable Z-enamides utilizing salicylaldehydes in an atom- and step-economic fashion. The stereochemistry of enamides might originate from the relative disposition of atoms present in isoxazole and the intramolecular hydrogen bonding. The reaction showed excellent scope as several structurally and electronically diverse salicylaldehydes and isoxazoles reacted efficiently.
- Debbarma, Suvankar,Bera, Sourav Sekhar,Maji, Modhu Sudan
-
supporting information
p. 835 - 839
(2019/01/26)
-
- Pyridopyrimidine based cannabinoid-1 receptor inverse agonists: Synthesis and biological evaluation
-
The synthesis, SAR and binding affinities are described for cannabinoid-1 receptor (CB1R) specific inverse agonists based on pyridopyrimidine and heterotricyclic scaffolds. Food intake and pharmacokinetic evaluation of several of these compounds indicate
- Debenham, John S.,Madsen-Duggan, Christina B.,Wang, Junying,Tong, Xinchun,Lao, Julie,Fong, Tung M.,Schaeffer, Marie-Therese,Xiao, Jing Chen,Huang, Cathy C.R.-R.,Shen, Chun-Pyn,Sloan Stribling,Shearman, Lauren P.,Strack, Alison M.,Euan MacIntyre,Hale, Jeffrey J.,Walsh, Thomas F.
-
scheme or table
p. 2591 - 2594
(2009/12/25)
-
- SUBSTITUTED PYRIDO[3,2-E][1,2,4]TRIAZOLO[4,3-C]PYRIMIDINE DERIVATIVES AS CANNABINOID-1 RECEPTOR MODULATORS
-
Novel compounds of the structural formula (I) are antagonists and/or inverse agonists of the Cannabinoid-1 (CB1) receptor and are useful in the treatment, prevention and suppression of diseases mediated by the CB1 receptor. The compounds of the present in
- -
-
Page/Page column 54
(2008/12/04)
-