135-45-5Relevant articles and documents
Unique ring expansion of a 6-3 bicyclic ring system forming a functionalized 7-membered ring accelerated by nitrogen functional groups
Yasui, Eiko,Ootsuki, Rio,Takayama, Kan,Nagumo, Shinji
, p. 3092 - 3095 (2017)
The treatment of (2-hydroxy-5-oxobicyclo [4.1.0] hept-3-en-3-yl) carbamic acid esters and (2-hydroxy-5-oxobicyclo [4.1.0] hept-3-en-3-yl) benzamide with TMSCl gave 7-membered ring compounds in good yields. The structure of the substituent at the C3 position of the cyclohexene ring is crucial for this ring expansion. The reaction mechanism is thought to involve the formation of a norcaradiene (bicyclo [4.1.0] hept-2,4-diene) structure and subsequent electrocyclic reaction.
Natural Abenquines and Their Synthetic Analogues Exert Algicidal Activity against Bloom-Forming Cyanobacteria
Nain-Perez, Amalyn,Barbosa, Luiz Cláudio Almeida,Maltha, Célia Regina álvares,Forlani, Giuseppe
, p. 813 - 818 (2017)
Abenquines are natural quinones, produced by some Streptomycetes, showing the ability to inhibit cyanobacterial growth in the 1 to 100 μM range. To further elucidate their biological significance, the synthesis of several analogues (4f-h, 5a-h) allowed us to identify some steric and electronic requirements for bioactivity. Replacing the acetyl by a benzoyl group in the quinone core and also changing the amino acid moiety with ethylpyrimidinyl or ethylpyrrolidinyl groups resulted in analogues 25-fold more potent than the natural abenquines. The two most effective analogues inhibited the proliferation of five cyanobacterial strains tested, with IC50 values ranging from 0.3 to 3 μM. These compounds may be useful leads for the development of an effective strategy for the control of cyanobacterial blooms.
Complexes
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Page/Page column 58; 68; 69; 74; 75; 76, (2017/10/24)
A palladium(II) complex of formula (1) or a palladium(II) complex of formula (3). Also, processes for the preparation of the complexes, and their use in carbon-carbon and carbon-heteroatom coupling reactions.