Selective Homologation of Ketones and Aldehydes with Diazoalkanes Promoted by Organoaluminum Reagents
作者:Keiji Maruoka、Amel B. Concepcion、Hisashi Yamamoto
DOI:10.1055/s-1994-25682
日期:——
Organoaluminum-promoted single homologation or ring expansion of ketones and aldehydes with diazoalkanes has been described, and among various organoaluminum reagents, exceptionally bulky methylaluminum bis(2,6-di-tert-butyl-4-methylphenoxide) (MAD) is found to be highly effective for the selective homologation of various ketones and aldehydes.
[EN] COMPOUNDS FOR INHIBITING WIP1, PRODRUGS AND COMPOSITIONS THEREOF, AND RELATED METHODS<br/>[FR] COMPOSÉS POUR INHIBER WIP1, PROMÉDICAMENTS ET COMPOSITIONS DE CEUX-CI, ET PROCÉDÉS APPARENTÉS
申请人:US HEALTH
公开号:WO2009029844A1
公开(公告)日:2009-03-05
The invention provides compounds useful in inhibiting the activity of a Wip1 protein in a cell as well as prodrugs thereof, related methods of use and compositions which include the aforesaid compounds and prodrugs thereof. The compounds comprise a ring structure having at least five functional groups bonded thereto, wherein each functional group is bonded to a different ring atom, and wherein the at least five functional groups comprise: (a) first (R1) and second (R3) moieties each comprising a phosphate group wherein these first and second moieties are separated by at least one ring atom; (b) first (R2) and second (R4) hydrophobic groups, wherein the first and second hydrophobic groups are separated by at least one ring atom, and wherein the first hydrophobic group is bonded to a ring atom located between the ring atoms to which the first (R1) and second (R2) moieties are bonded; and an amide or carboxylic acid (R5).
Methyl group migration in the reactions of alkynyltrialkylborates
作者:Andrew Pelter、Robert A. Drake
DOI:10.1016/s0040-4039(00)80450-5
日期:1988.1
It is shown that the methyl group cannot be used as a cheap, non-migrating group in the reactions of alkynyltrialkylborates with electrophiles. However, trimethylborane can be used as a methylboronating agent for alkynes, given the right choice of solvent, and this may be of use in terpene synthesis.
COMPOUNDS FOR INHIBITING WIP1, PRODRUGS AND COMPOSITIONS THEREOF, AND RELATED METHODS
申请人:Appella Ettore
公开号:US20100256098A1
公开(公告)日:2010-10-07
The invention provides compounds useful in inhibiting the activity of a Wip1 protein in a cell as well as prodrugs thereof, related methods of use and compositions which include the aforesaid compounds and prodrugs thereof. The compounds comprise a ring structure having at least five functional groups bonded thereto, wherein each functional group is bonded to a different ring atom, and wherein the at least five functional groups comprise: (a) first (R
1
) and second (R
3
) moieties each comprising a phosphate group wherein these first and second moieties are separated by at least one ring atom; (b) first (R
2
) and second (R
4
) hydrophobic groups, wherein the first and second hydrophobic groups are separated by at least one ring atom, and wherein the first hydrophobic group is bonded to a ring atom located between the ring atoms to which the first (R
1
) and second (R
2
) moieties are bonded; and an amide or carboxylic acid (R
5
).
Rearrangement of trisubstituted epoxides has been effected under the influence of various Lewis acids. Among these, methylaluminum bis(4-bromo-2,6-di-tert-butylphenoxide) (MABR) can be selectively rearranged from trisubstituted epoxides to aldehydes, while antimony pentafluoride is employable for selective rearrangement to ketones under mild conditions.