一种串联迈克尔-S Ñ的Ar环反应已被开发用于1-烷基-2,3-二氢-4-(1-合成ħ)-quinolinones。反应的成功遵循了最终的S N Ar环闭合的预期电子效应。双活化治疗1-(2-氟-5-硝基苯基)-2-丙烯-1-酮与伯胺的关系N,N-二甲基甲酰胺在50°C下放置24小时后,可提供67-78%的产率的2,3-二氢-4(1 H)-喹啉酮。单独激活1-(2-氟苯基)-2-丙烯-1-酮的反应相似,但是没有与受阻胺或芳香胺发生最终的闭环。最后,1-(2-氟-5-甲氧基苯基)-2-丙烯-1-酮在环上具有一个活化基团和一个失活基团,仅得到简单的1,4-加成产物。J.杂环化学,(2009)。
CYCLIC INHIBITORS OF 11BETA-HYDROXYSTEROID DEHYDROGENASE 1
申请人:Renz Martin
公开号:US20100331320A1
公开(公告)日:2010-12-30
This invention relates to novel compounds of the Formula Ik, Im
1
, Im
2
, Im
5
, In
1
, In
2
, In
5
, Io
1
, Io
2
, Io
5
, Ip
1
, Ip
3
, pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof, which are useful for the therapeutic treatment of diseases associated with the modulation or inhibition of 11β-HSD1 in mammals. The invention further relates to pharmaceutical compositions of the novel compounds and methods for their use in the reduction or control of the production of cortisol in a cell or the inhibition of the conversion of cortisone to cortisol in a cell.
A visible-light mediated ring opening reaction of alkylidenecyclopropanes for the generation of homopropargyl radicals
作者:Xiao-Yu Zhang、Chao Ning、Ben Mao、Yin Wei、Min Shi
DOI:10.1039/d1sc01889b
日期:——
Classical cyclopropylcarbinyl radical clock reactions have been widely applied to conduct mechanistic studies for probing radical processes for a long time; however, alkylidenecyclopropanes, which have a similar molecular structure to methylcyclopropanes, surprisingly have not yet attracted researcher's attention for similar ringopeningradical clock processes. In recent years, photocatalytic NHPI
Integrated soluble polymer and mesoporous silica as a double–type support to immobilize tertiary amine–Ru/diamine–bifunctionality for aza–addition/reduction cascade reaction
作者:Ming Gao、Fengwei Chang、Shitong Wang、Zeyang Liu、Zhitong Zhao、Guohua Liu
DOI:10.1016/j.jcat.2019.07.005
日期:2019.8
create an active site–isolated heterobifunctional catalyst is beneficial to an efficiently sequential organic transformation. Herein, an integrated soluble polymer and mesoporoussilica as a double–type support to immobilize the tertiary amine–Ru/diamine–bifunctionality for the construction of an active site–isolated catalyst is developed, where the tertiary amine–functionality is tethered in the outer
Highly enantioselective synthesis of chiral 3,4-dihydro-2H-pyran-5-carbonitrile via tandem Michael addition/asymmetric transfer hydrogenation/cyclization reactions catalyzed by a bifunctional Noyori-Ikariya type catalyst
作者:Dongsong Zheng、Rui Liu、Yu Wang、Tanyu Cheng、Guohua Liu
DOI:10.1016/j.mcat.2018.05.029
日期:2018.8
Tandem catalytic reaction in one-pot possesses remarkable advantages and is a powerful methodology for the synthesis of high value chemicals. Asymmetric transfer hydrogenation catalyzed by Ru-TsDPEN type catalysts, developed Noyori and Ikariya, is a useful strategy for constructing chiral alcohols and amines. Herein, a novel bifunctional Noyori-Ikariya type catalyst was developed, which displays good
一锅式串联催化反应具有显着优势,是合成高价值化学品的有力方法。由Noyori和Ikariya开发的Ru-TsDPEN型催化剂催化的不对称转移氢化是构建手性醇和胺的有用策略。在此,开发了一种新型的双官能Noyori-Ikariya型催化剂,其对迈克尔加成/ ATH /环化串联反应显示出良好的催化效率。通过在温和条件下的一锅反应,合成了一系列手性3,4-二氢-2 H-吡喃-5-腈,收率高(高达79%),对映选择性(高达97%)。
Copper-Catalyzed Asymmetric Synthesis of Bicyclo[3.<i>n</i>.1]alkenones
A series of highly strained bicyclo[3.n.1]alkenones have been successfully constructed in good-to-excellent enantioselectivities and moderate-to-good yields via copper-catalyzed formal [3+3] cycloaddition. The versatile chiral cycloadducts could be selectively converted into various valuable bridge systems, which hold considerable potential for the construction of natural and bioactive compounds containing