Detail of "87-92-3"

Reference

Catalyst component for olefin polymerization

Catalyst component for olefin polymerization. Furuhashi, Hiroyuki; Yamamoto, Tadashi; Imai, Masafumi; Ueno, Hiroshi (Toa Nenryo Kogyo K. K., Japan). Eur. Pat. Appl. EP 208524 A1 14 Jan 1987, 35 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL, SE. (European Patent Organization) CODEN: EPXXDW. CLASS: ICM: C08F004-64. ICS: C08F010-00. APPLICATION: EP 86-305212 4 Jul 1986. PRIORITY: JP 85-146805 5 Jul 1985. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) A reaction product for use in a Ti-contg. supported catalyst is obtained by contacting together a metal oxide or composite of metal oxides of Group IIA, IIB, IIIa, IIIB, IVA, or VB of the periodic table, with RMgR1 (or a complex with an org. compd. of Al, B, Be, Zn), (R,R1 = C1-20 alkyl, cylcoalkyl, aryl, aralkyl), and R2qM(OR3)n (M = Si, C, P, B, Al; R2, R3 = C1-20 alkyl, alkenyl, aryl, aralkyl; n + q = m; m = M valence). A N-filled reactor was charged with 5 g silica (G-952), which had been calcined in N at 200° for 2 h, 700° for 5 h, 20 mL 20% BuMgEt added, the mixt. stirred at 90° for 1 h, the suspension cooled to 0°, 22.1 g Si(OEt)4 in heptane added over 30 min, the reactants heated to 50° for 1 h, the supernatant liq. removed, the solid product washed with heptane, the solid product suspended in heptane, the suspension added to a soln. contg. 8.0 g Cl3CCH2OH in 10 mL heptane at 0° over 30 min, the reactants slowly heated to 60° over 1 h, and stirring continued at 60° for 1 h. The resulting solid product was washed with heptane, and then 3 times with PhMe. The solid product contained 36.6% SiO2, 5.1% Mg, and 38.5% Cl, and had a sp. surface area 257 m2/g. The solid component was added to 15 mL PhMe and 0.6 g 1,2-(BuO2C)2C6H4, heated to 50° for 2 h, 40 mL TiCl4 added, and the mixt. to 90° for 2 h. The solid product was washed 8 times with 60 mL of hexane, and dried at reduced pressure for 1 h, producing 8.4 g of a catalyst having sp. surface area 279 m2/g, pore vol. 0.81 cm3/g, and contained 53.1% SiO2, 7.4% Mg, 24.8% Cl, and 3.1% Ti. An autoclave was charged with 30.3 mg of the catalyst component, 0.97 mL of a soln. contg. 1 mol Et3Al in 1 L of heptane, 0. There are some commonly used reagents like 87-92-3 in this article.97 mL of a soln. contg. 0.1 mol PhSi(OEt)3 in 1 L of heptane, 0.1 L H, and 1 L liquefied C3H6, the reactor heated to 70°, and the polymn. carried out for 1 h. There was obtained 206 g of a white polypropylene powder having a bulk d. 0.42 g/cm3, hexane insols. 97.0%, and MFR 4.9 g/10 min. The catalyst had a yield of 6800 g polymer produced per g of the catalyst component, and 219 kg of polymer produced per g Ti in the catalyst component. .

Enantioselective construction of cyclopropane rings via asymmetric Simmons-Smith reaction of allylic alcohols

Enantioselective construction of cyclopropane rings via asymmetric Simmons-Smith reaction of allylic alcohols. Ukaji, Yutaka; Nishimura, Mitsuhiro; Fujisawa, Tamotsu (Dep. Chem. Mater., Mie Univ., Tsu 514, Japan). Chem. Lett., (1), 61-4 (English) 1992. CODEN: CMLTAG. ISSN: 0366-7022. 87-92-3 and 139492-32-3 which are cas registry numbers are also used here. DOCUMENT TYPE: Journal CA Section: 24 (Alicyclic Compounds) The Simmons-Smith reaction starting from allylic alcs. using (R,R)-diethyl tartrate as a chiral auxiliary was found to proceed enantioselectively; i.e., the treatment of allylic alcs., e.g. trans-PhCH:CHCH2OH, with diethylzinc and di-Et tartrate, followed by the reaction with diethylzinc and diiodomethane, afforded the corresponding cyclopropylmethyl alcs., e.g. (1R,2R)-I, in optically active form. .