Concise Total Synthesis and Stereochemical Revision of (+)-Naseseazines A and B: Regioselective Arylative Dimerization of Diketopiperazine Alkaloids
作者:Justin Kim、Mohammad Movassaghi
DOI:10.1021/ja206743v
日期:2011.9.28
Concise and enantioselective total syntheses of (+)-naseseazines A and B are described. Our regioselective and directed dimerization of diketopiperazines provides their critical C3-C(sp(2)) linkages, an assembly with plausible biogenetic relevance. We revise the absolute stereochemistry of (+)-naseseazines A and B.
描述了 (+)-naseseazines A 和 B 的简洁和对映选择性全合成。我们对二酮哌嗪的区域选择性和定向二聚化提供了其关键的 C3-C(sp(2)) 链接,这是一个具有合理生物遗传相关性的程序集。我们修改了 (+)-naseseazines A 和 B 的绝对立体化学。
Efficient metal-free photochemical borylation of aryl halides under batch and continuous-flow conditions
作者:Kai Chen、Shuai Zhang、Pei He、Pengfei Li
DOI:10.1039/c5sc04521e
日期:——
A rapid, chemoselective and metal-free C-B bond-forming reaction of aryl iodides and bromides in aqueous solution at low temperatures was discovered. This reaction is amenable to batch and continuous-flow conditions...
[EN] CANNABINOID-2-RECEPTOR AGONISTS<br/>[FR] AGONISTES DU RÉCEPTEUR DES CANNABINOÏDES 2
申请人:ISIS INNOVATION
公开号:WO2013041859A1
公开(公告)日:2013-03-28
The present invention relates to cannabinnoid-2-receptor (CB2R) agonist compounds. The present invention also relates to processes for the preparation of these compounds, to pharmaceutical compositions comprising them and to their use as therapeutic agents for the treatment and/or prevention of diseases or conditions in which CB2R stimulation is beneficial (especially inflammatory conditions).
<sup>1</sup>
H, <sup>13</sup>
C, <sup>19</sup>
F and <sup>11</sup>
B NMR spectral reference data of some potassium organotrifluoroborates
作者:Roberta A. Oliveira、Ricardo O. Silva、Gary A. Molander、Paulo H. Menezes
DOI:10.1002/mrc.2467
日期:2009.10
Complete (1)H, (13)C, (19)F and (11)BNMRspectraldata for 28 potassiumorganotrifluoroborates are described. The resonance for the carbon bearing the boron atom is described for most of the studied compounds. A modified (11)BNMR pulse sequence was used and better resolution was observed allowing the observation of (11)B-(19)F coupling constants for some of the studied compounds.
Palladium-Catalyzed Regioselective Arylation of Arene C-H Bond Assisted by the Removable 2-Pyridylsulfinyl Group
作者:Yuhong Zhang、Xunbin Zhang、Ming Yu、Jinzhong Yao
DOI:10.1055/s-0031-1290320
日期:2012.2
A palladium-catalyzed arylation of arene C-H bond assisted by a removable 2-pyridylsulfinyl group is described. The reaction employs aryltrifluoroborates as the arylation reagent, leading to the corresponding products in moderate to good yield with broad substrate scope. The directinggroup can be removed or converted to other useful functionalities, which showcases the potential synthetic application