Highly regioselective reaction of zirconocene-alkene complexes with aldehydes or ketones
作者:Noriyuki Suzuki、Christophe J. Rousset、Koichiro Aoyagi、Martin Kotora、Tamotsu Takahashi、Maki Hasegawa、Yu Nitto、Masahiko Saburi
DOI:10.1016/0022-328x(94)80112-6
日期:1994.6
Reactions of zirconocene-alkene complexes Cp2Zr(CH2CHR)(PR′3) (R H, Me, Et, SiR″3 or Ar) with aldehydes or ketones were investigated. Zirconocene-ethylene, -propylene or 1-butene complexes reacted with aldehydes or ketones at terminal carbons of alkenes to give the corresponding alcohols after hydrolysis with a high regioselectivity. A similar type of reaction product was also obtained by a reaction
An efficient and commercial phosphorylation process of a complex alcohol, such as secondary and tertiary alcohols, with P4O10 at high temperatures, and a product obtained by the process.
We developed a mild, metal-free practical method for late-stage dehydroxyazidation of structurally complex alcohols promoted by trifunctional hypervalent azido-iodine(III) reagents ABZ. The reactions proceeded via an SN2 pathway and showed excellent chemoselectivity and stereospecificity and gave the corresponding azides in high yields. The reaction mechanism was investigated by means of experiments
我们开发了一种温和、无金属的实用方法,用于由三官能高价叠氮碘 (III) 试剂 ABZ 促进的结构复杂醇的后期脱羟基叠氮化。该反应通过S N 2 途径进行,表现出优异的化学选择性和立体特异性,并以高收率得到相应的叠氮化物。通过实验和DFT计算研究了反应机理。
[EN] AGROCHEMICAL COMPOSITIONS FOR INDUCING ABIOTIC STRESS TOLERANCE<br/>[FR] COMPOSITIONS AGROCHIMIQUES À DES FINS D'INDUCTION À LA TOLÉRANCE AU STRESS ABIOTIQUE
申请人:VIB VZW
公开号:WO2014090988A1
公开(公告)日:2014-06-19
The present invention relates to agrochemical formulations and uses thereof for inducing abiotic stress tolerance in plants. More specifically the invention provides agrochemical compositions comprising compounds with formula (I) which are useful to increase abiotic stress tolerance in crops.
Reactions of zirconocene-alkene complexes with aldehydes gave alcohols as coupling products after hydrolysis. The carbon-carbonbondformation proceeded at C1 carbon of alkenes, in sharp contrast to the reactions of alkene-alkene coupling on zirconium. A similar alcohol was also obtained by the reaction of zirconacyclopentane with aldehyde after hydrolysis. Treatment of (C5Me5)2ZrEt2 with styrene gave