Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Montserrat Varea"'
Publikováno v:
ARKIVOC, Vol 2007, Iss 5, Pp 243-262 (2007)
Externí odkaz:
https://doaj.org/article/a2721ac42bc64927b279b6871458bf25
Publikováno v:
ARKIVOC, Vol 2007, Iss 5, Pp 243-262 (2007)
Bis-(trifluoromethyl)phenyl sulfones (BTFP sulfones) 1a-e, easily synthesized from 3,5-bis- (trifluoromethyl)benzenethiol, react under PTC with (Z)-1,4-dichloro-2-butene to afford the cyclopentenyl sulfones 3, which suffer further diastereoselective
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82f007027936a17d24b5522aeb4998d2
https://www.arkat-usa.org/arkivoc-journal/browse-arkivoc/ark.5550190.0008.519
https://www.arkat-usa.org/arkivoc-journal/browse-arkivoc/ark.5550190.0008.519
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 180:1119-1131
The use of π-electron-deficient aryl sulfones, especially 3,5-bis(trifluoromethyl) phenyl alkyl sulfones (BTFP-sulfones) as soft nucleophiles, as caboxylic acid protecting group and in Julia–Kocienski olefination reactions is described. In the cas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::744e0c34f5e7a8f4718d70633553ce65
https://doi.org/10.1080/10426500590910657
https://doi.org/10.1080/10426500590910657
Publikováno v:
Tetrahedron Letters. 45:573-577
The reaction between carbanions derived from alkyl 3,5-bis(trifluoromethyl)phenyl sulfones and aldehydes, affords with good yields and stereoselectivities the corresponding 1,2-disubstituted alkenes through the Julia–Kocienski olefination reaction.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34608269d9f6b4c8af7297d1712f35d8
https://doi.org/10.1016/j.tetlet.2003.10.196
https://doi.org/10.1016/j.tetlet.2003.10.196
Publikováno v:
Synthesis. :0277-0287
Several π-deficient 2-(arylsulfonyl)ethyl groups have been studied as carboxylic acid protecting groups. The 2-[3,5-bis(trifluoromethyl)phenylsulfonyl]ethyl group is the most easily removed protecting group for acids under mild basic conditions usin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8ae643fed9e3ce4c6693dea37e9d457
https://doi.org/10.1055/s-2003-36844
https://doi.org/10.1055/s-2003-36844
Publikováno v:
Helvetica Chimica Acta. 85:4287-4305
Different π-electron-deficient (arylsulfonyl)acetates 9 were synthesized (Scheme 1, Table 1), and their behavior as soft nucleophiles in the dialkylation reaction under phase-transfer catalysis conditions was studied (Schemes 2 and 3, Tables 2 and 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f3248e2a9afcca7c8a8632f35daf2c2
https://doi.org/10.1002/hlca.200290013
https://doi.org/10.1002/hlca.200290013
Publikováno v:
Tetrahedron Letters. 42:8845-8848
Different π-deficient arylsulfonyl groups have been studied as candidates for the stabilization of α-sulfonyl esters. The 3,5-bis(trifluoromethyl)phenylsulfonyl group has been shown to be the best substituent for the stereoselective synthesis of E
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f76af8f0f0fa5a693297bb90540a173c
https://doi.org/10.1016/s0040-4039(01)01920-7
https://doi.org/10.1016/s0040-4039(01)01920-7
Publikováno v:
Tetrahedron Letters. 40:5957-5960
( E )-5-Tosyl-4-pentenoic acid ( 9 ), prepared from 4-pentenoic acid by stereoselective in situ iodosulfonylation-dehydroiodimation, is lithiated at vinylic position and reacts with carbonyl compounds affording stereoselectively 6-hydroxy acids 12 .
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::451935e8f99c5e6dc68a489682afae0a
https://doi.org/10.1016/s0040-4039(99)01183-1
https://doi.org/10.1016/s0040-4039(99)01183-1
Publikováno v:
Tetrahedron Letters. 43:3459-3461
Chemoselective sulfur oxidation of functionalized sulfides was developed using catalytic amounts of MnSO4·H2O (1 mol%) and 30% H2O2 in the presence of a buffer solution of NaHCO3. Aromatic and aliphatic sulfides were oxidized to sulfones in quantita
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30136f18d851ad594e20f2d074120f86
https://doi.org/10.1016/s0040-4039(02)00598-1
https://doi.org/10.1016/s0040-4039(02)00598-1
Publikováno v:
ChemInform. 30
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07a2f3cfadbf89a767cb4c7972eb1564
https://doi.org/10.1002/chin.199943061
https://doi.org/10.1002/chin.199943061