Enantioselective Synthesis of Tertiary Allylic Fluorides by Iridium‐Catalyzed Allylic Fluoroalkylation
作者:Trevor W. Butcher、John F. Hartwig
DOI:10.1002/anie.201807474
日期:2018.10
Few allylic electrophiles containing two different substituents at a single allyl terminus and none in which one of the two substituents is a heteroatom, have been shown previously to react with iridium catalysts to form substitution products. We report that iridium‐catalysts are uniquely suited to form tertiary allylicfluorides enantioselectively by the addition of a diverse range of carbon‐centered
Bench‐Stable
<i>S</i>
‐(Monofluoromethyl)sulfonium Salts: Highly Efficient
<i>C</i>
‐ and
<i>O</i>
‐Regioselective Monofluoromethylation of 1,3‐Dicarbonyl Compounds
作者:Wen‐Bing Qin、Jian‐Jian Liu、Zhongyan Huang、Xin Li、Wei Xiong、Jia‐Yi Chen、Guo‐Kai Liu
DOI:10.1002/ejoc.202000998
日期:2020.9.30
Novel bench‐stable S‐(monofluoromethyl)‐S‐phenyl‐S‐(2,4,6‐trialkoxyphenyl)sulfonium salts were readily prepared for C‐ and O‐regioselective monofluoromethylation of 1,3‐dicarbonyl compounds in good to excellent yields under mild reaction conditions.
Synthesis and activity evaluation of the cyclic dipeptides arylidene N -alkoxydiketopiperazines
作者:Xia Tian、Juan Feng、Shi-ming Fan、Xiao-li zhen、Jian-rong Han、Shou-xin Liu
DOI:10.1016/j.bmc.2016.08.038
日期:2016.11
intramolecular acylation. Possible cyclization and acid-catalyzed rearrangement-fragmentation mechanisms were discussed. The crystal structure of the novel diketopiperazine further confirmed the rearrangement mechanism. Most compounds exhibited antitumor activity. Several compounds were more potent against caspase-3. Specifically, compounds 6e, 6g, and 6f inhibited caspase-3 at IC50 values lying within the
.beta.-mercapto-propanamide derivatives useful in the treatment of
申请人:Zambon Group S.p.A.
公开号:US05506259A1
公开(公告)日:1996-04-09
Compounds of formula ##STR1## wherein R, R.sub.1, R.sub.2, Het and n have the meanings reported in the description, processes for their preparation and pharmaceutical compositions which contain them as active ingredients are described. The compounds of formula I are useful in the treatment of cardiovascular diseases.
A stereoselective synthesis of arylidene N-alkoxydiketopiperazines viaoxime-ether formation and intramolecular acylation is described, followed by an acid-catalysed rearrangement-fragmentation to give novel diketopiperazine hemiaminal derivatives with useful bioactivity against certain tumour cell lines.