One-Pot Synthesis of 2-Substituted 1H-Isoindole-1,3(2H)-dithiones from Secondary Benzothioamides and Isothiocyanates
摘要:
The reaction of 2,N-dilithiobenzothioamides, generated from readily available secondary benzothioamides and two equivalents of butyllithium, with isothiocyanates, followed by aqueous workup, gives the corresponding N-1,N-2-disubstituted benzene-1,2-dicarbothioamides, which undergo intramolecular attack of one of the thioamide nitrogen on the adjacent thiocarbonyl moiety with loss of primary amines to provide 2-substituted 1H-isoindole-1,3(2H)-dithiones.
Leznoff, Clifford C.; Greenberg, Shafrira; Khouw, Ben, Canadian Journal of Chemistry, 1987, vol. 65, p. 1705 - 1713
作者:Leznoff, Clifford C.、Greenberg, Shafrira、Khouw, Ben、Lever, A. B. P.
DOI:——
日期:——
LEZNOFF, CLIFFORD C.;GREENBERG, SHAFRIRA;KHOUW, BEN;LEVER, A. B. P., CAN. J. CHEM., 65,(1987) N 8, 1705-1713
作者:LEZNOFF, CLIFFORD C.、GREENBERG, SHAFRIRA、KHOUW, BEN、LEVER, A. B. P.
DOI:——
日期:——
Method for making SPME fiber
申请人:ALIZADEH REZA
公开号:US20100000261A1
公开(公告)日:2010-01-07
It is disclosed a method for making SPME fibers. The SPME fibers consist of metal-oxide coatings on fused-silica fibers. The coatings are prepared from a water-based solution containing a predetermined amount of metal ion and a predetermined amount of a reactant. The water based solution and the fused-silica fibers are kept at the temperatures below 100° C. for a predetermined time to obtain SPME fibers. The SPME fibers are applied for extraction of pesticides and other organic compounds such as 1,4-dichloro-2-nitrobenzene; Biphenyl; and Acenaphthene in the water based solution and cooling gas of a power generator respectively.