344452-10-4Relevant articles and documents
Ethylene-tetrafluoroethylene (ETFE) cotelomer iodides and their transformation to surface protection intermediates
Qiu, Weiming,Raghavanpillai, Anilkumar,Brown, Peter A.,Atkinson, Wayne R.,Vincent, Michael F.,Marshall, William J.
, p. 12 - 23 (2015/03/05)
A new class of fluorotelomers was synthesized via the cotelomerization of ethylene and tetrafluoroethylene (TFE) with 1H,1H,2H,2H-perfluoroalkyl iodides. The telomerization led to ethylene-tetrafluoroethylene (ETFE) cotelomer iodides with the incorporation of ethylene and TFE in the cotelomer chain in an alternating fashion. By controlling the reaction parameters such as total pressure, temperature, feed ratio of the monomers, initiator feed, and conversion rate, eight-carbon cotelomer iodide or higher cotelomers could be produced preferably. The ETFE cotelomer iodides were transformed to a variety of intermediates such as alcohols, azides, amines and thiols, precursors useful to make surface modification agents.
3-ethyl-, 3-propyl- or 3-butyl-chroman and thiochroman derivatives
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, (2008/06/13)
A compound having the following general formula (1): in whichR1 represents an ethyl group, etc.;R2 represents a hydrogen atom, etc.;R3 represents a C1-C5 perhalogenoalkyl group, etc.;each of R4 and R5 independently represents a hydrogen atom, etc.;X represents an oxygen atom or a sulfur atom;m represents an integer of 2 to 14; andn represents an integer of 2 to 7;or an enantiomer of the compound, or a hydrate or a pharmaceutically acceptable salt of the compound or its enantiomer is advantageous in pharmaceutical use because of its anti-estrogenic activity.