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rencontre in chaallah Rapid preparation of pyranoquinolines using microwave dielectric heating in combination with fractional product distillation
T Razzaq, C.O. Kappe, Tetrahedron Letters 2007, 48, 2513 – 2517
site de rencontre gratuit cГ©libataire rencontre en france Stubborn reactions are typically carried out in refluxing conditions, using high boiling solvents such as xylenes, 1,2-dichlorobenzene and N-methyl pyrrolidone. High boiling solvents are then difficult to remove upon workup, especially as reaction scale increases. The High-Pressure setup is capable of replacing reflux devices, moving from high boiling solvents to low boiling solvents. Moreover, high temperature reactions (up to 300 °C) are allowed. The benefits are well known and documented in terms of easier work-up and products purity. Up to 15 high-pressure vessels may be used simultaneously for parallel synthesis.
source url Design and Synthesis of a g1b8-Cyclodextrin Oligomer: A New Platform with Potential Application as a Dendrimeric Multicarrier
A. Barge et al., Chem. Eur. J. 2013, 19, 12086 – 12092
site de rencontre français 100 gratuit Heating heterogeneous reaction mixtures, thick media or solid phase systems suffers of inhomogeneous temperature distribution and stirring difficulties using conventional microwave instruments. The innovative Solid-Phase setup offers the unique capability of physically rotate the reaction vessel, to achieve very homogenous bulk heating of slurries, viscous and solid reaction mixtures media. The reaction temperature is controlled by a contact-less infrared sensor. Furthermore, the Solid-Phase setup allows operations under normal atmosphere, inert gas, and vacuum. Functionalization and modifications of materials, polycondensation, coating, dehydration of natural oils are some of the most common area of application.
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K. Martina et al., ACS Sustainable Chem. Eng. 2014, 2, 2595−2603