Domino syntheses of five-, six- and seven-membered O-, N- and S-heterocycles from α-, β- and γ-substituted carboxylic esters
作者:J. Löffler、R. Schobert
DOI:10.1039/p19960002799
日期:——
By a one-pot procedure, tetronic acids, tetronates, coumarins, benzoxepinones and their N- and S-analogues are readily accessible from keteneylidene(triphenyl)phosphorane 2 and carboxylic esters bearing OH, NHR or SH groups in an alpha-, beta- or gamma-position by an addition/Wittig olefination/(Claisen rearrangement) sequence. This cascade can be controlled by temperature variation. Extension of this procedure by a further addition step yielding annulated bisheterocycles such as the furoquinolone 28 is possible in some cases.
CORRAL, C.;LISSAVETZKY, J., J. CHEM. SOC. PERKIN TRANS., 1984, N 12, 2711-2714
作者:CORRAL, C.、LISSAVETZKY, J.
DOI:——
日期:——
AQUEOUS COMPOSITION COMPRISING A COMPOUND OF THIOLACTONE TYPE AND A SILICONE AND PROCESS FOR TREATING KERATIN MATERIALS WITH THE COMPOSITION
申请人:L'Oreal
公开号:US20200030215A1
公开(公告)日:2020-01-30
The present invention relates to a composition comprising: (a) one more compound(s) of thiolactone type, and (b) one or more silicones.
Corral, Carlos; Lissavetzky, Jaime, Journal of the Chemical Society. Perkin transactions I, 1984, p. 2711 - 2714