摘要:
A method for producing a 7-methyl-3-methylene-7-octenyl carboxylate compound (1), the method including the step of coupling a nucleophilic reagent of General Formula (8):
wherein M is a cationic moiety, with an acetal compound of General Formula (9):
wherein R1 and R2, which may be the same or different, are each an alkyl group having 1 to 6 carbon atoms, or are bonded to each other to form a divalent alkylene group having 2 to 12 carbon atoms, and X is a leaving group, to obtain the 7-methyl-3-methylene-7-octenal acetal compound.
摘要:
Methods for the synthesis and use of functionalized, substituted naphthalenes are described. The functionalized, substituted naphthalenes display useful properties including liquid crystals and fluorescence properties, such as solvatochromatic fluorescence, with high quantum yields, Stoke's shift, and show emission maxima that are significantly red-shifted.
摘要:
The invention disclosed herein relates to novel Peribysin E analogs of general formula-I. Further the invention provides simple, economical and short synthesis of Peribysin E and its analogs of Formula I, in good yield and purity leading to the identification of more potent cell adhesion inhibitors.
摘要:
The present invention relates to a process of a cis/trans isomerization of an unsaturated compound A being selected from the group consisting of unsaturated ketones, unsaturated ketals, unsaturated aldehydes, unsaturated acetals, unsaturated carboxylic acids, esters of an unsaturated carboxylic acid and amides of an unsaturated carboxylic acid using polythiol as cis/trans isomerization catalyst. It has been observed that the isomerization is very efficient and fast.
摘要:
The present invention relates to deuterated 1-piperazino-3-phenyl-indanes and salts thereof with activity at dopamine receptors D1 and D2 as well as the 5HT2 receptors in the central nervous system, to medicaments comprising such compounds as active ingredients, to the use of such compounds in the treatment of diseases in the central nervous system, and to methods of treatment comprising administration of such compounds.
摘要:
Disclosed are methods for rerouting radical cascade cyclizations by using alkenes as alkyne equivalents. The reaction sequence is initiated by a novel 1,2 stannyl shift which achieves chemo- and regioselectivity in the process. The radical “hopping” leads to the formation of the radical center necessary for the sequence of selective cyclizations and fragmentations to follow. In the last step of the cascade, the elimination of a rationally designed radical leaving group via β-C—C bond scission aromatizes the product without the need for external oxidant. The Bu3Sn moiety, which is installed during the reaction sequence, allows further functionalization of the product via facile reactions with electrophiles as well as Stille and Suzuki cross-coupling reactions. This selective radical transformation opens a new approach for the controlled transformation of enynes into extended polycyclic structures of tunable dimensions.
摘要:
The present invention relates to a process of manufacturing (6R,10R)-6,10,14-trimetylpentadecan-2-one in a multistep synthesis from 6,10-dimetylundec-5-en-2-one or 6,10-dimetylundeca-5,9-dien-2-one. The process is very advantageous in that it forms in an efficient way the desired chiral product from a mixture of stereoisomers of the starting product.
摘要:
The present invention concerns a process for the preparation with high selectivity of a compound of formula (I) by isomerization at room temperature of compound of formula (II) in the presence of a complex of formula [Ru(dienyl)2H]X.
摘要:
The present invention concerns a process for the isomerisation of an exo double bond toward an endo double bond being performed in the presence of a catalyst system comprising palladium (Pd) or platinum (Pt) and molecular hydrogen or a hydrogen source.
摘要:
Isomerization of β-keto-allenes of the general formula I wherein R1 is hydrogen, methyl or ethyl, in particular hydrogen or methyl; R2 is hydrogen or methyl; R3 is hydrogen or methyl, in particular methyl and R4 is an aliphatic hydrocarbon residue containing 1-37 carbon atoms, into corresponding α,γ-dienones of formula II by treatment with a basic ion exchange resin.