Reference

An improved synthesis of 4-vinyl-2,6-di-tert-butylpyridine and its suspension copolymerization with styrene and divinylbenzene

An improved synthesis of 4-vinyl-2,6-di-tert-butylpyridine and its suspension copolymerization with styrene and divinylbenzene. Wright, Michael E.; Pulley, Shon R. (Dep. Chem. Biochem., Utah State Univ., Logan, UT 84322-0300, USA). J. Org. Chem., 52(8), 1623-4 (English) 1987. CODEN: JOCEAH. ISSN: 0022-3263. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Treatment of 4-methyl-2,6-di-tert-butylpyridine [38222-83-2] with sec-BuLi at -78° followed by reaction with chloromethyl Me ether [107-30-2] yielded 4-(2-methoxyethyl)-2,6-di-tert-butylpyridine (I) [107082-94-0] in 90% yield. Treatment of I with 2 equiv tert-BuOK in THF produced 4-vinyl-2,6-di-tert-butylpyridine (II) [81869-04-7]. Suspension polymn. 107-30-2 and 81869-04-7 which are cas registry numbers of substances are two of reagents here. of II with styrene and divinylbenzene gave polymer [107054-29-5] beads contg. 1.6 mequiv of base per g of polymer. .

Initiation of vinyl ether polymerization by trimethylsilyl triflate, dimethyl sulfide, and adventitious water

Initiation of vinyl ether polymerization by trimethylsilyl triflate, dimethyl sulfide, and adventitious water. Cho, Chang Gi; Feit, Ben Ami; Webster, Owen W. (Exp. Stn., Du Pont Central Res. and Dev., Wilmington, DE 19880-0328, USA). Macromolecules, 25(8), 2081-5 (English) 1992. CODEN: MAMOBX. ISSN: 0024-9297. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) In an effort to use F3CSO3SiMe3 (I) as an initiator for the living polymn. of iso-Bu vinyl ether in the presence of Me2S, the no.-av. mol. wt. (Mn) vs. conversion plot showed a linear relation for a given solvent. The slope, however, deviated from the calcd. 38222-83-2 and 109-53-5 which are cas registry numbers are also used here. one based on an initiator efficiency of 1; i.e., the mol. wts. were higher than expected. The addn. of water or alc. increased the initiator efficiency, indicating that triflic acid formed by hydrolysis of I was the true initiator. Indeed, in the presence of 2,6-di-tert-butyl-4-methylpyridine (II), a proton trap, no polymn. was obsd. at ￡0°. Living polymn. occurred, however, with II in the system when an aldehyde or ketone was added. In these examples, proton NMR showed that a Me3SiO group was covalently bound to the polymer. The Mn, calcd. by assuming 1 Me3Si group per chain, agreed well with that obtained by gel-permeation chromatog. .