Scandium Triflate Catalyzed Allylation of Acetals and <i>gem</i>-Diacetates: A Facile Synthesis of Homoallyl Ethers and Acetates
作者:Jhillu S. Yadav、Basi V. Subba Reddy、P. Srihari
DOI:10.1055/s-2001-13379
日期:——
Scandium triflate catalyzes efficiently the allylation reactions of acetals and gem-diacetates with allyltrimethylsilane at ambient temperature to afford the corresponding homoallyl ethers and acetates in high yields. Also it is found to be effective for the direct formation of homoallyl ethers from aldehydes and allylsilane in presence of trimethylorthoformate.
The invention provides new imidazole derivatives of the general formula: ##STR1## wherein R.sup.1 represents a methyl or ethyl group, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each represent a hydrogen or halogen atom or an alkyl or alkoxy group which may optionally be substituted by one or more fluorine atoms, and R.sup.2, R.sup.3 and R.sup.4 do not all represent hydrogen atoms, which possess useful herbicidal properties.
[DE] HERBIZID WIRKSAME 4-DIALKOXYMETHYL-2-PHENYLPYRIMIDINE<br/>[EN] HERBICIDALLY ACTIVE 4-DIALKOXYMETHYL-2-PHENYLPYRIMIDINES<br/>[FR] 4-DIALCOXYMÉTHYL-2-PHÉNYLPYRIMIDINES AYANT UNE ACTION HERBICIDE
申请人:BAYER IP GMBH
公开号:WO2013124246A1
公开(公告)日:2013-08-29
Es werden 4-Dialkoxymethyl-2-phenylpyrimidine der allgemeinen Formel (I) als Herbizide beschrieben. In dieser Formel (I) stehen R1 bis R6 für Reste wie Wasserstoff, organische Reste wie Alkyl, und andere Reste wie Halogen, Nitro, Cyano und Formyl.
Nair, Vijay; Rajan, Roshini; Balagopal, Lakshmi, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2005, vol. 44, # 1, p. 141 - 143