A Novel [2 + 2] Photodimerization of <i>N</i>-[(<i>E</i>)-3,4-Methylenedioxycinnamoyl]dopamine in the Solid State
作者:Yoshikatsu Ito、Souta Horie、Yasuhiro Shindo
DOI:10.1021/ol0162419
日期:2001.7.1
[reaction: see text] To give photoreactivity to catecholamines, N-cinnamoyl-substituted dopamines (E)-5a-5c and O,O'-dimethyldopamines (E)-3a-3c were prepared under solvent-free conditions. A particularly interesting observed photoreactivity was that of N-[(E)-3,4-methylenedioxycinnamoyl]dopamine ((E)-5c), which underwent a novel type of [2 + 2] photodimerization in the solid state, giving exclusively
Synthesis and antihyperglycemic activity of novel N-acyl-2-arylethylamines and N-acyl-3-coumarylamines
作者:Atma P. Dwivedi、Shailesh Kumar、Vandana Varshney、Amar B. Singh、Arvind K. Srivastava、Devi P. Sahu
DOI:10.1016/j.bmcl.2008.03.003
日期:2008.4
A series of novel N-acyl-2-arylethylamines and N-acyl-3-coumarylamines were synthesized and evaluated for their anti-hyperglycemic activity. Compounds 3g and 6d exhibited lowering of postprandial plasma glucose by 30.7%, 23.3% in SLM and 25.6%, 25.4% in STZ models respectively which is significant compared to metformin and glybenclamide. Other compounds exhibited moderate to good activity ranging from 19.5% to 32.8% in SLM and 3.26% to 25.4% in STZ models. (C) 2008 Elsevier Ltd. All rights reserved.
Single-crystal-to-single-crystal photodimerization of 4-chlorocinnamoyl-<i>O</i>,<i>O</i>'-dimethyldopamine
作者:Shigeru Ohba、Yoshikatsu Ito
DOI:10.1107/s0108768102022760
日期:2003.2.1
[2+2]Photodimerization of the title compound, C(19)H(20)ClNO(3), has been observed in situ by single-crystal X-ray diffraction. Pairs of monomers related by centers of symmetry have parallel C=C bonds at a C.C distance of 4.155 (17) A. Irradiation of a single crystal with a mercury lamp achieves 100% conversion to the dimer. Redetermination of the structure during the course of the reaction revealed