METHOD OF PREPARATION OF STEREOSPECIFIC QUINONE DERIVATIVES
申请人:Mehta Dilip S.
公开号:US20150126763A1
公开(公告)日:2015-05-07
The description provides processes for the regio and stereospecific synthesis of polyprenylatedquinone derivatives, such as Vitamin K1, K2 and Ubiquinone, exploiting dithioacetals, especially 1,3-dithiane, mediated Umpolung chemistry which works along a new concept “Inhibiting resonance delocalization (IRD)” to overcome isomerization generated due to delocalization of allyliccarbanion on the π-electron cloud of an allylic systems by the conventional synthesis.
Method of preparation of stereospecific quinone derivatives
申请人:Mehta, Dilip
公开号:EP2868658B1
公开(公告)日:2018-05-02
ANTICANCER AGENTS BASED ON REGULATION OF PROTEIN PRENYLATION
申请人:Rose Seth D.
公开号:US20090143467A1
公开(公告)日:2009-06-04
Oncoproteins such as Ras and RhoB are known to induce cell division in an unrestrained manner when such proteins are localized at the inner surface of a cancer cell membrane. The localization is effected by the prenylation reaction, whereby a hydrophobic group (e.g. a farnesyl group) is attached to the protein in the presence of an enzyme (e.g. farnesyl protein transferase). Deactivation of the prenylation enzyme through covalent modification can therefore ultimately result in the mitigation and/or cessation of cancer cell growth. Various prenylation inhibitors having the necessary structural groups to bond covalently, or essentially irreversibly, to the prenylation enzyme include carbonyl or thiocarbonyl compounds (or masked versions of these compounds) and alpha oxo-epoxides bonded to a hydrophobic, substrate-mimicking group. The carbonyl or thiocarbonyl compounds also contain a nucleofugal atom or group to enhance the tendency to form covalent bonds.