157207-60-8

Upstream product

• 56-40-6 glycine 
• 69672-66-8 [1R-(1β,2β,4aβ,8aα)]-3-(1,2,3,4,4a,7,8,8a-octahydro-1,2,4a,5-tetramethyl-1-naphthyl)methyl-2-hydroxy-5-methoxy-2,5-cyclohexadiene-1,4-dione 
• 583-63-1 ortoquinone 
• 41722-49-0 (S)-1,4a-dimethyl-4,4a,7,8-tetrahydronaphthalene-2,5(3H,6H)-dione 
• 259194-86-0 4,5-Dimethoxy-3-((1R,2S,4aS,8aS)-1,2,4a,5-tetramethyl-1,2,3,4,4a,7,8,8a-octahydro-naphthalen-1-ylmethyl)-[1,2]benzoquinone 
• 13239-13-9 2,5-dimethoxyhydroquinone 
• 3117-03-1 2,5-dimethoxyquinone 
• 2441-46-5 1,2,4,5-tetramethoxybenzene 
• 26742-33-6 (4aS)-1,4aβ-dimethyl-4,4a,7,8-tetrahydronaphthalene-2,5(3H,6H)-dione-5-ethyeneacetal 
• 259194-83-7 (4aS,5S,8aS)-5,8a-Dimethyl-6-methylene-5-(2,3,5,6-tetramethoxy-benzyl)-octahydro-naphthalen-1-one 
• 259194-79-1 (1R,2S,4aS)-trans-(1,2,3,4,4a,7,8,8a-octahydro)-1α-[(2,3,5,6-tetramethoxyphenyl)-methyl]-1β,2β,4aβ,5-tetramethyl-naphthalene 
• 69672-73-7 [1R-(1β,2β,4aβ,8aα)-3-(1,2,3,4,4a,7,8,8a-octahydro-1,2,4a,5-tetramethyl-1-naphthyl)methyl]-2,5-dimethoxy-2,5-cyclohexadiene-1,4-dione 
• 213026-15-4 (1R,4aS)-trans-decahydro-1-α-[(2,3,5,6-tetramethoxyphenyl)methyl]-1β,4aβ-dimethyl-2-methylene-5-(2-methyl-1,3-dioxolan-2-yl)-naphthalene 
• 213026-14-3 (1S,4aS)-trans-decahydro-1-α-[(2,3,5,6-tetramethoxyphenyl)methyl]-1β,4aβ-dimethyl-5-(2-methyl-1,3-dioxolan-2-yl)naphthalene-2-one 

Relevant academic research and scientific papers

Nakijiquinones C and D, New Sesquiterpenoid Quinones with a Hydroxy Amino Acid Residue from a Marine Sponge Inhibiting c-erbB-2 Kinase

Nakijiquinones C (1) and D (2), new sesquiterpenonid quinones with a serine or a threonine residue, respectively, have been isolated from an Okinawan marine sponge of the family Spongiidae and the structures were determined by spectroscopic data and chemi

NOVEL USE OF SESQUITERPENE DERIVATIVE

The present disclosure relates to a novel use of a sesquiterpene derivative, more particularly to a composition for preventing, improving or treating macular degeneration or macular edema caused by vascular leakage in the eye, the composition containing a

Total synthesis and biological evaluation of the nakijiquinones

The Her-2/Neu receptor tyrosine kinase is vastly overexpressed in about 30% of primary breast, ovary, and gastric carcinomas. The nakijiquinones are the only naturally occurring inhibitors of this important oncogene, and structural analogues of the nakijiquinones may display inhibitory properties toward other receptor tyrosine kinases involved in cell signaling and proliferation. Here, we describe the first enantioselective synthesis of the nakijiquinones. Key elements of the synthesis are (i) the reductive alkylation of a Wieland - Mieschertype enone with a tetramethoxyaryl bromide, (ii) the oxidative conversion of the aryl ring into a p-quinoid system, (iii) the regioselective saponification of one of the two vinylogous esters incorporated therein, and (iv) the selective introduction of different amino acids via nucleophilic conversion of the remaining vinylogous ester into the corresponding vinylogous amide. The correct stereochemistry and substitution patterns are completed by conversion of two keto groups into a methyl group and an endocyclic olefin via olefination/reduction and olefination/isomerization sequences, respectively. This synthesis route also gave access to analogues of nakijiquinone C with inverted configuration at C-2 or with an exocyclic instead of an endocyclic double bond. Investigation of the kinase-inhibiting properties of the synthesized derivatives revealed that the C-2 epimer 30 of nakijiquinone C is a potent and selective inhibitor of the KDR receptor, a receptor tyrosine kinase involved in tumor angiogenesis. Molecular modeling studies based on the crystal structure of KDR and a model of the ATP binding site built from a crystal structure of FGF-R revealed an insight into the structural basis for the difference in activity between the natural product nakijiquinone C and the C-2 epimer 30.