Lactic acid derivative, liquid crystal composition containing same and liquid crystal device
申请人:CANON KABUSHIKI KAISHA
公开号:EP0175591B1
公开(公告)日:1991-03-06
Hull, W. E.; Kuenstlinger, M.; Breitmaier, Eberhard, Angewandte Chemie, 1980, vol. 92, # 11, p. 957 - 959
作者:Hull, W. E.、Kuenstlinger, M.、Breitmaier, Eberhard
DOI:——
日期:——
US4775223A
申请人:——
公开号:US4775223A
公开(公告)日:1988-10-04
US5167857A
申请人:——
公开号:US5167857A
公开(公告)日:1992-12-01
Synthesis of the silver(<scp>i</scp>) complex of CH<sub>2</sub>[CH(pz<sup>4Et</sup>)<sub>2</sub>]<sub>2</sub>containing the unprecedented [Ag(NO<sub>3</sub>)<sub>4</sub>]<sup>3−</sup>anion: A general method for the preparation of 4-(alkyl)pyrazoles
作者:Daniel L. Reger、James R. Gardinier、T. Christian Grattan、Monica R. Smith、Mark D. Smith
DOI:10.1039/b307306h
日期:——
two-step method for the syntheses of 4-(alkyl)pyrazoles has been developed. The first step involves the reaction between organyl diethylacetals and the Vilsmeier reagent to give a mixture of ethoxy- and dimethylamino- acroleins. This mixture reacts directly with hydrazine monohydrogenchloride to yield the desired (4-substituted)pyrazoles. The 4-(phenyl)pyrazole derivative exhibited a markedly lower solubility