摘要:
A process for the preparation of a polyunsaturated thiol comprising: (1) reacting a polyunsaturated alcohol in the presence of a compound of formula R 2 -SO 2 Hal wherein R 2 is a C 1-20 hydrocarbyl group, such an C 1-10 alkyl group, to form a polyunsaturated sulphonyl ester; (2) converting the polyunsaturated sulphonyl ester to a polyunsaturated thioester by reacting with an anion of formula - SC(=O)R 4 wherein R 4 is a C 1-20 hydrocarbyl group; (3) converting the polyunsaturated thioester to form a polyunsaturated thiol optionally in the presence of an antioxidant, e.g. using a metal carbonate. (4) reacting said polyunsaturated thiol with a compound (LG)R 3 COX wherein X is an electron withdrawing group and R 3 is an alkylene group carrying a leaving group (LG), such as LG-CH 2 - forming (I) where X is an electron withdrawing group and LG is a leaving group; optionally in the presence of an antioxidant, so as to form a polyunsaturated ketone compound.
摘要:
Methods and compositions utilizing 2-aminoindan derivatives collectively represented by Formula I as described and defined in the specification for regulating binge behavior, particularly binge drinking, are disclosed.
摘要:
Oligophenylene monomers for the synthesis of polymeric precursors for the preparation of graphene nanoribbons, the polymeric precursors, and methods for preparing them, as well as methods for preparing the graphene nanoribbons from the polymeric precursors and the monomers are provided.
摘要:
The present invention provides novel compounds of the general formula (I), and pharmaceutically acceptable salts thereof, processes for the manufacture of these novel compounds and medicaments, containing them. The compounds of the present invention show anti-proliferative and differentiation-inducing activity, which results in inhibition of tumor cell proliferation, induction of apoptosis and inhibition of invasion. The invention also covers the use of such compounds for the treatment of diseases such as cancer and for the manufacture of corresponding medicaments.
摘要:
The invention relates to methods of preparing compounds of formula (II) wherein Z represents -OR 1 or -N(R 2 )R 2a -, where R 1 is lower alkylene (C 1 -C 6 ), R 2 is lower alkyl or H and R 2a is lower alkylene (C 1 -C 6 ) or H;Q is absent when R 2a is H and is otherwise selected from the group consisting of H, -OH and protected forms of -OH; one of X and Y is halogen and the other is -OSO 2 R 3 , where R 3 is selected from the group consisting of lower alkyl (C 1 -C 6 ), phenyl and CH 2 phenyl. The method comprises the steps of: (a) reacting a compound of formula (I) with aziridineethanol or a 2-[(2-haloethyl)amino]ethanol in the presence of a metal halide, to form a compound of the formula (III) wherein one of X and E is halogen and the other is hydroxy, and (b) reacting the compound of formula (III) with an alkyl- or arylsulfonyl halide or alkyl- or arylsulfonyl anhydride to obtain a compound of the formula (II). The invention also relates to methods of preparing compounds of formula (IV) from the compounds of formula (II) so obtained, and to novel compounds of formula (IIb) useful as intermediates in these methods.