Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Katsuhisa Masumoto"'
Publikováno v:
Organic Process Research & Development. 10:245-250
In the [bis{(4R)-(1-naphthyl)-5,5-dimethyloxazoline}/copper]-catalyzed asymmetric cyclopropanation of 2,5-dimethyl-2,4-hexadiene with tert-butyl diazoacetate, the effects of a counterion of the copper complex were studied. The[CuCl/bisoxazoline/Ph3CP
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca70bc0fd131edf9df818e6c8d672913
https://doi.org/10.1021/op050203d
https://doi.org/10.1021/op050203d
Publikováno v:
Tetrahedron Letters. 37:3005-3008
The titled Claisen modification is shown to proceed with a remarkably high level of diastereoselection and asymmetric transmission by virtue of the proper choice of the combination of the silyl triflate and the tertiary amine used.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d16399e718c500aebd784f920f5ab166
https://doi.org/10.1016/0040-4039(96)00485-6
https://doi.org/10.1016/0040-4039(96)00485-6
Publikováno v:
ChemInform. 27
The titled Claisen modification is shown to proceed with a remarkably high level of diastereoselection and asymmetric transmission by virtue of the proper choice of the combination of the silyl triflate and the tertiary amine used.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f7cf2c427a3b7daa321c9182891dffd
https://doi.org/10.1002/chin.199632062
https://doi.org/10.1002/chin.199632062
Publikováno v:
The Journal of organic chemistry. 70(8)
Some new bisoxazoline ligands with an aryl group at the 4-position and gem-dimethyl groups at the 5-position on the oxazoline ring were prepared from arylglycines. Remarkable enhancement of the trans-selectivity (trans/cis = 87/13) and the enantiosel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f09c7bf087e64e2b4822daf625c0dda
https://pubmed.ncbi.nlm.nih.gov/15822998
https://pubmed.ncbi.nlm.nih.gov/15822998
Publikováno v:
Bulletin of the Chemical Society of Japan. 55:2470-2479
A series of polymethylenebis(diphenylcyclopropenium) dications with the polymethylene chain of one to six carbons (4n=1–6) were synthesized and characterized by spectral and analytical means. Among the dications 4n=3–6 which were isolated as perc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c41c2d80e0298d8bb2331feb072c718e
https://doi.org/10.1246/bcsj.55.2470
https://doi.org/10.1246/bcsj.55.2470
Publikováno v:
Journal of the Chemical Society, Chemical Communications. :232
The title compound, a stable salt of a new carbocation, has been synthesized and shown by 13C n.m.r. spectroscopy to have a dipolar structure.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2b2ff90c07c9bd78eef02a5776d1f1d
https://doi.org/10.1039/c39770000232
https://doi.org/10.1039/c39770000232