A chiral N-linked C2-symmetric bidentate phosphoramidite (N-Me-BIPAM) was newly developed for the rhodium-catalyzed enantioselective addition of arylboronicacids to N-sulfonylimines. This ligand achieved high enantioselectivities in a range of 84–99% ee in additions of arylboronicacids to N-tosyl- and N-nosylarylaldimines.
An efficient method for construction of tetrahydroisoquinoline skeleton via double cyclization process using ortho-vinylbenzaldehydes and amino alcohols: application to the synthesis of (S)-cryptostyline II
作者:Kazuteru Umetsu、Naoki Asao
DOI:10.1016/j.tetlet.2008.02.152
日期:2008.4
Thermal double cyclization reaction using ortho-vinylbenzaldehyde and 3-aminopropanols proceeded smoothly to give isoquinoline derivatives via 6π-azaelectrocyclization pathway. The method was applied to the efficientsynthesis of (S)-cryptostyline II.
Highly Enantioselective Arylation of <i>N</i>,<i>N</i>-Dimethylsulfamoyl-Protected Aldimines Using Simple Sulfur–Olefin Ligands: Access to Solifenacin and (<i>S</i>)-(+)-Cryptostyline II
作者:Tao Jiang、Wen-Wen Chen、Ming-Hua Xu
DOI:10.1021/acs.orglett.7b00776
日期:2017.4.21
With the use of a simplesulfur–olefinligand, a highlyenantioselectiverhodium-catalyzed addition of arylboroxines to N,N-dimethylsulfamoyl-protected aldimines has been achieved, allowing access to a broad range of chiral diarylmethylamines in high yields (up to 98%) with uniformly excellent enantioselectivities (up to 99% ee). This catalyst system is also applicable to the arylation of N-tosyl arylimines
Cobalt-Catalyzed Enantioselective C–H Annulation of Benzylamines with Alkynes: Application to the Modular and Asymmetric Syntheses of Bioactive Molecules
作者:Yong-Jie Wu、Jia-Hao Chen、Ming-Ya Teng、Xiang Li、Tian-Yu Jiang、Fan-Rui Huang、Qi-Jun Yao、Bing-Feng Shi
DOI:10.1021/jacs.3c10714
日期:——
enantioselective C–H functionalization strategy has revolutionized the logic of natural product synthesis. However, previous applications have heavily relied on the use of noble metal catalysts such as rhodium and palladium. Herein, we report the efficient synthesis of C1-chiral 1,2-dihydroisoquinolines (DHIQs) via enantioselective C–H/N–H annulation of picolinamides with alkynes catalyzed by a more sustainable and
过渡金属催化的对映选择性C-H官能化策略彻底改变了天然产物合成的逻辑。然而,以前的应用严重依赖于贵金属催化剂的使用,例如铑和钯。在此,我们报道了在更可持续且更便宜的3d金属催化剂乙酸钴(II)的催化下,通过吡啶甲酰胺与炔烃的对映选择性C-H/N-H环化,有效合成了C 1 -手性1,2-二氢异喹啉(DHIQ)四水合物。以良好的收率和优异的对映选择性(高达 98% 收率和 >99% ee)获得了各种对映体富集的 DHIQ。该方法的稳健性和合成潜力通过几种四氢异喹啉生物碱的模块化和不对称合成得到了证明,这些生物碱包括( S )-降劳丹苷、( S )-劳丹苷、( S )-木洛匹宁、( S )-sebiferine和( S ) -cryptostyline II,以及 (+)-solifenacin、FR115427 和 (+)-NPS R-568 关键中间体的不对称合成。
Substituted isoquinolines as ultra short acting neuromuscular blockers
申请人:Avera Pharmaceuticals, Inc.
公开号:EP1526130A1
公开(公告)日:2005-04-27
Ultra short acting neuromuscular blocking agents of Formula (I) which are useful as skeletal muscle relaxants during emergency intubation procedures, routine surgery and post-operative settings are disclosed,
wherein q and t are independently from 0 to 4; and X1 and X2 are independently halogen; ha and hb are independently from 0 to 2; Z1 and Z2 are independently hydrogen, C1-C6 alkyl, C2-C6 alkenyl or C2-C6 alkynyl with the proviso that Z1 and Z are not both hydrogen; Y1, Y2, Y3 and Y4 are independently hydrogen, halogen or C1-C3 alkoxy; m and p are independently 1 to 6; n and r are independently 0 to 4; with the proviso that if ha and hb are both 0, then r is 0 and n is 0 to 2; R1 and R14 are independently hydrogen, halogen, C1-C3 alkoxy, or R2 and R3 together with the carbon atoms to which they are bonded, R5 and R6 together with the carbon atoms to which they are bonded, may independently form a methylenedioxy or ethylenedioxy moiety contained in a five- or six-membered ring; W1 and W2 are carbon; and A is a pharmaceutically acceptable anion.