Chemosensor for the optical detection of aliphatic amines and diamines
作者:Susanne Reinert、Gerhard J. Mohr
DOI:10.1039/b717796h
日期:——
Two new chemosensor dyes with either one or two trifluoroacetophenone recognition moieties have been investigated in terms of reversibly interacting with amines and diamines.
Star-Shaped Tripodal Chemosensors for the Detection of Aliphatic Amines
作者:Susanne Körsten、Gerhard J. Mohr
DOI:10.1002/chem.201000787
日期:2011.1.17
In this work, three new tripodal triphenylamine dyes are presented that are capable of reversibly binding amines and diamines to form hemiaminals through a covalent bond. The dyes were synthesized by the Heck reaction and possess stilbene units with one, two, or three trifluoroacetyl groups as receptor moieties. Their interaction with amines and diamines led to changes in their absorption and emission
Catalytic Enantioselective Direct Aldol Addition of Aryl Ketones to α‐Fluorinated Ketones
作者:Connor J. Thomson、David M. Barber、Darren J. Dixon
DOI:10.1002/anie.201916129
日期:2020.3.23
catalytic enantioselective synthesis of α-fluorinated chiral tertiary alcohols from (hetero)aryl methyl ketones is described. The use of a bifunctional iminophosphorane (BIMP) superbase was found to facilitate direct aldol addition by providing the strong Brønsted basicity required for rapid aryl enolate formation. The new synthetic protocol is easy to perform and tolerates a broad range of functionalities
描述了由(杂)芳基甲基酮催化合成α-氟化手性叔醇的对映体。发现使用双功能亚氨基正膦(BIMP)超碱可通过提供快速形成芳基烯醇酸酯所需的强布朗斯台德碱度,促进直接添加羟醛。新的合成方案易于执行,并具有高对映选择性(高达> 99:1 er),可耐受各种功能和杂环。已经证明了多克的可扩展性以及催化剂的回收和再循环。1 H NMR研究表明,与现有技术水平的催化体系相比,BIMP催化的速率提高了1400倍。通过合成各种对映体丰富的结构单元和杂环,突出了醛醇产品的实用性,其中包括:
New benzoxazine derivatives useful as integrin receptor antagonists
申请人:——
公开号:US20030069236A1
公开(公告)日:2003-04-10
The present invention relates to a class of compounds represented by the formula (I)
1
or a pharmaceutical acceptable salt, prodrug or ester thereof, pharmaceutical compositions comprising compounds of the formula (I), and methods of selectively inhibiting or antagonizing &agr;
v
&bgr;
3
integrin.
Enantioselective, Catalytic Vicinal Difluorination of Alkenes
作者:Felix Scheidt、Michael Schäfer、Jérôme C. Sarie、Constantin G. Daniliuc、John J. Molloy、Ryan Gilmour
DOI:10.1002/anie.201810328
日期:2018.12.10
The enantioselective, catalytic vicinal difluorination of alkenes is reported by II/IIII catalysis using a novel, C2‐symmetric resorcinol derivative. Catalyst turnover via in situ generation of an ArIIIIF2 species is enabled by Selectfluor oxidation and addition of an inexpensive HF–amine complex. The HF:amine ratio employed in this process provides a handle for regioselective orthogonality as a function
I / I III催化使用新型C 2对称间苯二酚衍生物进行烯烃的对映选择性催化邻位二氟化反应。通过Selectfluor氧化和添加廉价的HF-胺络合物,可以原位生成ArI III F 2物种进行催化剂转换。此过程中使用的HF:胺比率为布朗选择性酸度的区域选择性正交性提供了一个解决方案。公开了从1,1-二氟化途径(基因)向所需的1,2-二氟化途径(邻位)的选择性逆转(两个方向均> 20:1)。用电子不足的苯乙烯进行验证有助于产生古老的CF 3的手性生物等排体药物发现中普遍使用的单元(20个示例,最高94:06 er)。还使用p- TolI(高达> 95%的收率)显示了反应的非手性变体。