受体烯烃(符号化为C之间的反应C和由至少一个conjugatively吸电子基团取代)和ñ -叔在存在-butylhydroxylamine吨-BuNO作为氧化剂使氨基氧形式上是HC的自旋加合物-C和吨-BuNO并在相同的形成在C之间的热或光化学反应的氨基氧的适当情况下C和α苯基ñ -叔-butylnitrone(PBN)。研究的受体烯烃为N-苯基马来酰亚胺,马来酰亚胺,N-甲基马来酰亚胺,马来酸酐,富马酸二乙酯,2,3-(2 H 2)富马酸酯,马来酸二乙酯,三羧酸三甲酯,1,4-苯醌,富马腈,丙烯酸甲酯,甲基丙烯酸甲酯和丙烯腈。
Poly(methylhydrosiloxane) as a reductant in the catalytic base-free Wittig reaction
作者:Jan Tönjes、Lars Longwitz、Thomas Werner
DOI:10.1039/d1gc00953b
日期:——
catalytic, base-free Wittigreaction forming highly functionalized alkenes with PMHS as a terminal reductant and butylacetate as a green solvent. Poly(methylhydrosiloxane) (PMHS) is a non-toxic, enviromentally friendly, inexpensive and easy to handle reductant. However, the inherent low reactivity hampers its applicability in catalytic reactions, such as P(III)/P(V) redox cycling reactions. Most of these
On the reported intermediacy of vinyl radicals in spontaneous polymerization: An ESR-spin trapping study and its significance for the bond forming initiation theory
作者:Eugene A. Mash、Hans-Gert Korth、Suzanne M. DeMoss
DOI:10.1016/s0040-4020(97)00964-2
日期:1997.11
Deuterated isopropyl vinyl sulfides and diethyl fumarate were synthesized and employed in a re-investigation of the mechanism of initiation of spontaneous polymerization of these comonomers by means of spin-trapping/ESR spectroscopy. Previous radical spin-trapping studies had been interpreted as indicating the involvement of vinyl radicals. While our studies produced data substantially in agreement
Synthesis and Reactivity of Ester‐Functionalized 5‐Membered Rh
<sup>I</sup>
‐κ
<sup>2</sup>
‐C,O‐Chelates and Their Relevance in Rh(cod)‐Mediated Carbene Polymerization
作者:Markus Finger、Martin Lutz、Joost N. H. Reek、Bas de Bruin
DOI:10.1002/ejic.201100981
日期:2012.3
allyl complex and with the concomitant release of the corresponding 1,3-diene, which is derived from the allyl ligand. The product is unstable and further reacts by means of a bimolecular C–H activation process to form a related dinuclear complex [(cod)Rh(μ-–CH(COOR)–CH–C(OR)=O–})2Rh(cod)], in which the carbon dianion of the dimethyl or diethyl succinate bridges two Rh(cod) moieties. The complex was
corresponding acrylic acid‐d3 and methacrylic acid‐d5 derivatives. The olefinic functionality, as well as the methyl group on the unsaturated functionality of the substrate, were satisfactorily deuterated via the hydrogen (H)‐deuterium (D) exchange reaction. The obtained deuterated compounds are useful buildingblocks and efficiently converted to the corresponding desired products including a polymer without the
Formation of aminoxyls by oxidative addition of N-tert-butylhydroxylamine to acceptor olefins
作者:Lennart Eberson
DOI:10.1039/a904368c
日期:——
The reaction between an acceptor olefin (symbolized as CC and substituted by at least one conjugatively electron-withdrawing group) and N-tert-butylhydroxylamine in the presence of t-BuNO as an oxidant gives an aminoxyl which formally is a spin adduct of HC–C˙ and t-BuNO and in the appropriate cases identical to the aminoxyl formed in the thermal or photochemical reaction between CC and α-phenyl-N-tert-butylnitrone
受体烯烃(符号化为C之间的反应C和由至少一个conjugatively吸电子基团取代)和ñ -叔在存在-butylhydroxylamine吨-BuNO作为氧化剂使氨基氧形式上是HC的自旋加合物-C和吨-BuNO并在相同的形成在C之间的热或光化学反应的氨基氧的适当情况下C和α苯基ñ -叔-butylnitrone(PBN)。研究的受体烯烃为N-苯基马来酰亚胺,马来酰亚胺,N-甲基马来酰亚胺,马来酸酐,富马酸二乙酯,2,3-(2 H 2)富马酸酯,马来酸二乙酯,三羧酸三甲酯,1,4-苯醌,富马腈,丙烯酸甲酯,甲基丙烯酸甲酯和丙烯腈。