Reference

Organic borate coupling agents

Organic borate coupling agents. Fein, Marvin Michael; Patnaik, Birendra Kumar; Chu, Frank K. Y. (Dart Industries, Inc., USA). U.S. US 4073766 14 Feb 1978, 4 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08K009-04. NCL: 260042140. APPLICATION: US 76-750753 15 Dec 1976. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Mixed alkyl borates (ROBOR1OR2, R = C1-6 alkyl; R1, R2 = C8-22 alkyl) are coupling agents for filled polymers, e.g. polyolefins. Thus, triisopropyl borate [5419-55-6] 60.0, cetyl alc. [36653-82-4] 154.8, and Ti(OBu)4 5.1 g were heated 2 h at 115-20° while removing iso-PrOH to give a quant. yield (178.5 g) of dicetylisopropylborate (I) [66230-16-8]. I was coated onto CaCO3 at 0.01-0. ratio and the filler was used in ethylene-propylene block copolymer [9010-79-1] and polypropylene [9003-07-0] to improve their phys. properties.

Regiospecific synthesis of 2-fluoro-3-O-methylestrone using cesium fluorosulfate

Regiospecific synthesis of 2-fluoro-3-O-methylestrone using cesium fluorosulfate. Diorazio, Louis J.; Widdowson, David A.; Clough, John M. (Dep. Chem., Imp. Coll. Sci. Technol.There are some reagents with their cas registry numbers 113776-56-0 and 5419-55-6 are used in this study. Med., London SW7 2AY, UK). J. Chem. Soc., Perkin Trans. 1, (4), 421-5 (English) 1992. CODEN: JCPRB4. ISSN: 0300-922X. DOCUMENT TYPE: Journal CA Section: 32 (Steroids) The regiospecific synthesis of an A-ring fluorinated estrone I is described. Treatment of the h6-arenetricarbonylchromium(0) complex II ( R= H), derived from 3-O-methylestrone, with BuLi followed by transmetalation to the arylboronic acid gave a single regioisomer II [R = B(OH)2]. This could be elaborated further to give 2-fluoro-3-O-methylestrone I in 27% yield using cesium fluoroxysulfate. The fluorination step was sufficiently rapid to be of potential use in Positron Emission Transaxial Tomog. applications with the 18F radioisotope. .