Reference

Synthesis and properties of copolymers of vinylpyrrolidone with acrolein diethylacetals

Synthesis and properties of copolymers of vinylpyrrolidone with acrolein diethylacetals. Panarin, E. F.; Gavrilova, I. I.; Nesterov, V. V. (Inst. Vysokomol. Soedin., Leningrad, USSR). Vysokomol. Soedin., Ser. B, 20(1), 66-9 (Russian) 1978. CODEN: VYSBAI. ISSN: 0507-5483. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) In the bulk copolymn. of vinylpyrrolidone [88-12-0] (M1) with acrolein di-Et acetal [3054-95-3] (M2) in the presence of AIBN, the reactivity ratio was r1 = 3.02 ± 0.02 and r2 = 0.01 ± 0.01. Such values indicate that M1 adds primarily to a similar radical whereas M2 adds to a dissimilar radical of the growing chain to give a copolymer [59779-28-1] in which blocks of M1 units are absent. Such distribution excludes pyran ring formation. Due to the replaceable H alpha to the vinyl group in M2, M2 acts as a chain transfer agent in its copolymn. with M1 and fulfills the function of mol. wt. regulator. The mol. wt. distribution of the copolymer was detd. using a modified gas chromatog. method. The copolymer was converted to the aldehyde form by treatment with 0.1N HCl at 20-80° in a H2O-alc. medium or by ion exchange in H2O. Such copolymers were of interest as carriers of physiol. active substances.

Allyl ethers

Allyl ethers. Mukaiyama, Teruaki; Ishikawa, Hiroshi (Otsuka Pharmaceutical Co., Ltd., Japan). Japan. Kokai JP 51125012 1 Nov 1976 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF.There are some reagents with their cas registry numbers 74-96-4 and 3054-95-3 are used in this study. CLASS: IC: C07C043-14. APPLICATION: JP 74-128193 6 Nov 1974. DOCUMENT TYPE: Patent CA Section: 25 (Noncondensed Aromatic Compounds) Allyl ethers RR1C:CR2CR3R4OR5 (R, R1, R2, R3 = H, alkyl, aryl, aralkyl; R4 = alkyl, CH2:CHCH2, CH2:CH, aralkyl, cycloalkyl; R5 = alkyl) were prepd. by treating .alpha.,.beta.-unsatd. acetals RR1C:CR2CR3(OR5)2 with R4MgX (X = halo) in the presence of TiXn (n = 3-6). Thus, 0.9 g PhCH:CHCH(OMe)2, 0.95 g TiCl4 and PhCH2CH2MgBr in THF were stirred 6 h at -78.degree. to give 81% PhCH:CHCH(OMe)CH2CH2Ph. Also, PhCH:CHCH(OMe)Et, PhCH:CHCH(OMe)CH2CH:CH2, MeCH:CHCH(OMe)CH2CH2Ph, and H2C:CHCH(OMe)CH2CH2CH2Ph were prepd. .