The first formyl radical generation from α-chloro N-methoxyphthalimides is reported, enabling selective aldehyde synthesis by alkene hydroformylation under mild photoredox conditions. Experimental and computational approaches establish the concerted hydrochloride elimination for the formyl radical generation from α-chloro methoxy radicals.
Provided is a method for producing polytetrafluoroethylene including polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a hydrocarbon surfactant to obtain polytetrafluoroethylene, wherein an amount of the hydrocarbon surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium, and the polytetrafluoroethylene contains 99.0% by mass or more of a polymerization unit based on tetrafluoroethylene and 1.0% by mass or less of a polymerization unit based on the modifying monomer.
Synthesis of unsymmetrical 2,5-di-n-alkylpyrrolidines: 2-hexyl-5-pentylpyrrolidine from the thief ants , and its homologues.
作者:Tappey H. Jones、Murray S. Blum、H.M. Fales
DOI:10.1016/s0040-4039(01)87182-3
日期:1979.1
1,4-Diketones from skipped acetylenes
作者:Walter J. Gensler、Jean Claude Petitpierre、John W. Dean
DOI:10.1021/jo00415a020
日期:1978.10
COMPOSITION, STRETCHED BODY AND METHOD OF MANUFACTURING THEREOF
申请人:DAIKIN INDUSTRIES, LTD.
公开号:US20220119556A1
公开(公告)日:2022-04-21
A composition having a breaking strength of 10.0 N or more, containing a polytetrafluoroethylene, and substantially free from a compound represented by the following general formula (3):
(H—(CF
2
)
8
—SO
3
)
q
M
2
General Formula (3):
wherein M
2
is H, a metal atom, NR
5
4
, where each R
5
may be the same or different and is H or an organic group having 1 to 10 carbon atoms, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.