نتایج جستجو برای: organosuperbase
تعداد نتایج: 14 فیلتر نتایج به سال:
The synthesis of oxazolines and imidazolines was achieved by activation of isocyanides with water. Mechanistic studies show that the organosuperbase proazaphosphatrane is tolerant of water within the reaction medium, with a beneficial and cooperative effect being observed.
An efficient synthetic method for successful synthesis of amine denderon on SBA-15 and related Pd (II) complex has been developed. This modified mesoporous material was characterized by various techniques such as TEM, XRD, atomic absorption spectroscopy, N2 adsorption-desorption, and FT-IR. The catalytic activities of the prepared catalysts were investigated by employing aerobic oxidation of al...
an efficient synthetic method for successful synthesis of amine denderon on sba-15 and related pd (ii) complex has been developed. this modified mesoporous material was characterized by various techniques such as tem, xrd, atomic absorption spectroscopy, n2 adsorption-desorption, and ft-ir. the catalytic activities of the prepared catalysts were investigated by employing aerobic oxidation of al...
The deprotonative functionalization of α,α-difluoromethyl ketones is described herein. Using a catalytic organosuperbase and silane additive, the corresponding difluoroenolate could be generated trapped with aldehydes to deliver various α,α-difluoro-β-hydroxy in high yields. This new strategy tolerates numerous functional groups represents access by direct deprotonation difluoromethyl unit. dia...
In this account, we summarized our recent efforts to develop molecular transformations under Brønsted base catalysis on the basis of own guiding principles for designing reaction systems, that include “the generation and application anionic species which are difficult utilize in conventional systems” employment organosuperbases possessing much higher basicities than organic bases as a catalyst”...
An organosuperbase (N,N-dimethylbiguanide) immobilized on mesoporous and magnetically separable silica supports, was found for the first time, to act as a highly-stable, scalable and efficient heterogeneous catalyst for the Henry reaction under mild and neutral condition. Several factors such as catalyst amount, solvent and reaction time concerning the reactivity were also discussed. The proced...
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