Detail of "98-53-3"

Reference

New Carbonyl Olefination Using Thioacetals

New Carbonyl Olefination Using Thioacetals. Horikawa, Yasuo; Watanabe, Mikako; Fujiwara, Tooru; Takeda, Takeshi (Department of Applied Chemistry, Tokyo University of Agriculture and Technology, Tokyo 184, Japan).Several substances are used for example 3561-67-9 which is its cas registry number. Journal of the American Chemical Society, 119(5), 1127-1128 (English) 1997 American Chemical Society. CODEN: JACSAT. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 21 (General Organic Chemistry) Olefination of carbonyl compds. using the titanium-based reagents prepd. from thioacetals was studied. The reaction of thioacetals with Cp2Ti[P(OEt)3]2 (I) at room temp., followed by treatment of the resulting organotitanium species with ketones or aldehydes, gave Wittig-like olefination products in good yields. Under similar reaction conditions, carboxylic esters and lactones were also transformed into enol ethers. I was prepd. by redn. of Cp2TiCl2 with magnesium in the presence of P(OEt)3 and mol. sieves. .

Cr(CO)3-complexed benzylphosphonates - a Horner-Emmons-Wadsworth approach to alkenyl substituted tricarbonylchromium arene complexes

Cr(CO)3-complexed benzylphosphonates - a Horner-Emmons-Wadsworth approach to alkenyl substituted tricarbonylchromium arene complexes. Mueller, Thomas J. J. (Institut fur Organische Chemie, Technischen Hochschule Darmstadt, Darmstadt D-64287, Germany). Tetrahedron Letters, 38(6), 1025-1028 (English) 1997 Elsevier.Chemicals with cas numbers 12155-45-2 and 98-53-3 also play role. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 29 (Organometallic and Organometalloidal Compounds) The Horner-Emmons-Wadsworth reaction of h6-benzylphosphonate complexes I [e.g., R = Me, X = H (1), 2-MeO] with aldehydes [R'CHO, e.g., R' = Ph, (E)-PhCH:CH (2)], dialdehydes and ketones with NaH as a base in boiling THF gives rise to (arene)Cr(CO)3 substituted trans-alkenes II (Y = H, 2-MeO, CH:CHR') in moderate to good yields. E.g., 1 is added to NaH in THF followed by addn. of 2 and the reaction mixt. is refluxed for 12 h to give II [Y = H, R' = CH:CHPh-(E)] in 89% yield. .