Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Jure J. Herak"'
Autor:
Jure J. Herak
Publikováno v:
Sulfur reports. 18:379-392
Stereochemically pure 4-oxoazetidine-2-sulfinates and -sulfinamides are readily epimerized in the presence of hydrogen chloride and at the same time transformed by sulfinate-sulfinamide interconversion. Under similar reaction conditions they give 2-a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4c13c65331498919e9c718f6d175292
https://doi.org/10.1080/01961779608047901
https://doi.org/10.1080/01961779608047901
Publikováno v:
Tetrahedron. 51:5083-5092
The enantiomerically pure 2-azacepham sulfoxide 2a was synthesized by stereocontrolled intramolecular cyclization of sulfinates 3 or sulfinamides 8 in the presence of dry hydrogen chloride followed by triethylamine. The cyclization accrued via equili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0629389b49c7c0f5b8fd1ab37b1b4da0
https://doi.org/10.1016/0040-4020(95)98705-m
https://doi.org/10.1016/0040-4020(95)98705-m
Publikováno v:
Tetrahedron: Asymmetry. 5:1605-1612
The enantiomerically pure substituted 2-azacephams 5 were synthesized by intramolecular cyclization of sulfinamides 4. Their absolute configurations were confirmed by X-ray crystal structure determination of (5R,6R)-4-benzyl-2-isopropylidene-5-oxo-5-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5da69b4d1e4d2a739d30a9d0c4aee10f
https://doi.org/10.1016/0957-4166(94)80131-2
https://doi.org/10.1016/0957-4166(94)80131-2
Publikováno v:
ChemInform. 25
The anhydro 2-azacephams 9 were prepared starting from penicillanate sulphoxides 1 via 4-aminosulphinyl-2-oxoazetidines 3 and 4 and 4-aminosulphonyl-2-oxoazetidines 6 and 8. New functionalized monocyclic beta-lactams 5 and 7 were also produced as pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f40eb8f68c632241a37cd41b77b7f639
https://doi.org/10.1002/chin.199406126
https://doi.org/10.1002/chin.199406126
Publikováno v:
ChemInform. 26
The enantiomerically pure substituted 2-azacephams 5 were synthesized by intramolecular cyclization of sulfinamides 4. Their absolute configurations were confirmed by X-ray crystal structure determination of (5R,6R)-4-benzyl-2-isopropylidene-5-oxo-5-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5be40c34b171fb944c0f940a9d82cb1
https://doi.org/10.1002/chin.199503255
https://doi.org/10.1002/chin.199503255
Autor:
Jure J. Herak
Publikováno v:
ChemInform. 28
Stereochemically pure 4-oxoazetidine-2-sulfinates and -sulfinamides are readily epimerized in the presence of hydrogen chloride and at the same time transformed by sulfinate-sulfinamide interconversion. Under similar reaction conditions they give 2-a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58235a26630e1a09605dd901319df932
https://doi.org/10.1002/chin.199707292
https://doi.org/10.1002/chin.199707292
Publikováno v:
ChemInform. 30
The X-ray structure analyses of the two optically active penam derivatives, (2S,4S,5R,6S)-2-benzylcarbamoyl-6-bromo-3,3-dimethyl-4-thia-1-azabicyclo[3.2.0]heptan-7-one 4-oxide hydrate, C 15 H 17 BrN 2 O 3 S.H 2 O, (I), and (5R)-3-benzylimino-2-isopro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88b1933dc8752d2101f17289bd376f07
https://doi.org/10.1002/chin.199926027
https://doi.org/10.1002/chin.199926027
The X-ray structure analyses of the two optically active penam derivatives, (2S,4S,5R,6S)-2-benzylcarbamoyl-6-bromo-3,3-dimethyl-4-thia-1-azabicyclo[3.2.0]heptan-7-one 4-oxide hydrate, C 15 H 17 BrN 2 O 3 S.H 2 O, (I), and (5R)-3-benzylimino-2-isopro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::336f0bf648c167f3be5192222aebf293
https://www.bib.irb.hr/21469
https://www.bib.irb.hr/21469
Autor:
Jure J. Herak, Mladen Vinković
Publikováno v:
Croatica Chemica Acta
Volume 69
Issue 4
Volume 69
Issue 4
Opisan je jednostavan postupak za pripravu (5R, 6S)-3-benzilimino-6-bromo-2-izopropiliden-7-okso-4-tia-1-azabiciklo[3.2.0]heptana 2 i (5R, 6S)-3-benzilimino-2-izopropiliden-7-okso-4-tia-1-azabiciklo[3.2.0]heptana 8. Derivati 2-imino-penama su priređ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::df6d2338b2b8fce1ec2f6dda0a630eb0
https://www.bib.irb.hr/987
https://www.bib.irb.hr/987
Autor:
Jure J. Herak
Publikováno v:
Croatica Chemica Acta
Volume 68
Issue 2
Volume 68
Issue 2
Stereochemically pure methylsulfmates 3 and benzylsulfìnamides 4 are readily epimerized in the presence of hydrogen chloride and at the same time they can be transformed by sulfinate-sulfinamide interconversion. Formation of sulfinyl chlorides 2 as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______951::1e9424f3899ad9d3b10036cc0b264584
https://hrcak.srce.hr/136760
https://hrcak.srce.hr/136760