Hydrogen peroxide/dimethyl carbonate: a green system for epoxidation of N-alkylimines and N-sulfonylimines. One-pot synthesis of N-alkyloxaziridines from N-alkylamines and (hetero)aromatic aldehydes
作者:Jamil Kraïem、Donia Ghedira、Thierry Ollevier
DOI:10.1039/c6gc01394e
日期:——
A green method for epoxidation of imines using environmentally benign oxidant system, H2O2/dimethyl carbonate, was developed. N-Alkyloxaziridines were prepared in high yields from N-alkylamines and (hetero)aromatic aldehydes in one-pot fashion....
A revisedstructure for trichodermatide A, which is a C10 epimer of the originally reported structure, is proposed. The revision is supported by the X-ray structure of a syntheticintermediate synthesized according to our previous route for trichodermatide A. The revised stereochemistry was also supported by NOESY experiment. Finally, we synthesized Trauner's compound corresponding to the originally
提出了木霉肽 A 的修订结构,它是最初报告结构的 C10 差向异构体。根据我们之前的木霉胺 A 路线合成的合成中间体的 X 射线结构支持了修订。NOESY 实验也支持了修订后的立体化学。最后,我们从我们的 Trichodermatide A 合成中间体通过 C10 处的光信反应合成了与最初报道的结构相对应的 Trauner 化合物。
Preparation and crystal structures of two 3‐anthracenyl isoxazolyl sulfonamides
作者:Chun Li、Brendan Twamley、Nicholas R. Natale
DOI:10.1002/jhet.5570450132
日期:2008.1
Lateral metalation and oxidation of 3-(9′-anthryl)-isoxazoles (1), using Davis' oxaziridine (6), produced the desired hydroxylation (2), along with sulfonamide adduct (3), and in the case of the use of butyl lithium as base, butyl addition products (4) and (5). Structures of isoxazole sulfonamides (3a) and (5a), were obtained as the SR/RS-diastereomer, however, studies indicate that this is a consequence
N-OXIDES OF DIARYLUREA DERIVATIVES AND THEIR USE AS Chk1 INHIBITORS FOR THE TREATMENT OF CANCER
申请人:Boyle Robert George
公开号:US20090270416A1
公开(公告)日:2009-10-29
The invention provides a Chk-1 kinase inhibiting compound of the formula (I) or a salt, solvate or tautomer thereof, wherein: G is CH
2
, O, NH, NHCO or CONH; A is a group (CH
2
)
n
where n is 1 to 4 provided that when G is O or NH, n is at least 2; X
1
is nitrogen or CH; X
2
is nitrogen or a group CR
5
; X
3
is nitrogen or a group CR
5
; X
4
is nitrogen or CH; provided that no more than two of X
2
, X
3
and X
4
are nitrogen; and R
1
; R
2
; R
3
; R
4
; R
5
and R
6
are as defined in the claims.
Copper(II)-Catalyzed Aminohydroxylation of Olefins
作者:David J. Michaelis、Christopher J. Shaffer、Tehshik P. Yoon
DOI:10.1021/ja067894t
日期:2007.2.1
We report a novel copper(II)-catalyzed aminohydroxylation in which both heteroatoms of an N-sulfonyl oxaziridine are added across an alkene in a regioselective fashion. A variety of styrenes and electron-rich alkenes can be aminohydroxylated using this protocol. Preliminary investigations indicate that this new process is a rare non-oxenoid reaction of N-sulfonyl oxaziridines, involving a stepwise, polar mechanism rather than a concerted process.