- Enzymatic synthesis of capsaicin analogs with liver acetone powder
-
The enzymatic synthesis of capsaicin analogs with saturated or unsaturated acyl moieties has been achieved by using liver acetone powder as a catalyst.
- Kobata, Kenji,Yoshikawa, Koichi,Kohashi, Masahiro,Watanabe, Tatsuo
-
-
Read Online
- Lipophilicity of capsaicinoids and capsinoids influences the multiple activation process of rat TRPV1
-
Analogs of capsaicin, such as capsaicinoids and capsinoids, activate a cation channel, transient receptor potential cation channel vanilloid subfamily 1 (TRPV1), and then increase the intracellular calcium concentration ([Ca2+]i). Th
- Morita, Akihito,Iwasaki, Yusaku,Kobata, Kenji,Iida, Tohko,Higashi, Tomohiro,Oda, Kyoko,Suzuki, Asami,Narukawa, Masataka,Sasakuma, Shiho,Yokogoshi, Hidehiko,Yazawa, Susumu,Tominaga, Makoto,Watanabe, Tatsuo
-
-
Read Online
- Capsaicin derivatives with nitrothiophene substituents: Design, synthesis and antibacterial activity against multidrug-resistant S. aureus
-
To address the emergency caused by multi-drug resistant Staphylococcus aureus, a series of novel capsaicin derivatives with nitrothiophene substituents have been designed and evaluated for the antibacterial activities against S. aureus Newman and multidrug-resistant strains (NRS-1, NRS-70, NRS-100, NRS-108, and NRS-271). The structure-activity relationship was further revealed. Compound 13c, 13f, and 13g were highly active against staphylococcal growth, with minimal inhibition concentration (MIC) values of 0.39–1.56 μg/mL. The oxadiazole-derived compound 21, a bioisostere of ester 13f, is the most potent candidate for anti-growth of five multidrug-resistant S. aureus strains with MICs of 0.20–0.78 μg/mL, which is more active compared with vancomycin in vitro. Notably, these anti-staphylococcal compounds are much less cytotoxic to the normal kidney epithelial cell line (HK293T).
- Pei, Fang-Ning,Tang, Jie,Wang, Zhi-Cheng,Wei, Bingyan,Yang, Cai-Guang,Yang, Fan,Yang, Song,Yang, Teng,Yu, Li-Fang
-
-
- The SAR analysis of TRPV1 agonists with the α-methylated B-region
-
A series of TRPV1 agonists with amide, reverse amide, and thiourea groups in the B-region and their corresponding α-methylated analogues were investigated. Whereas the α-methylation of the amide B-region enhanced the binding affinities and potencies as agonists, that of the reverse amide and thiourea led to a reduction in receptor affinity. The analysis indicated that proper hydrogen bonding as well as steric effects in the B-region are critical for receptor binding.
- Cho, Yongsung,Kim, Myeong Seop,Kim, Ho Shin,Ann, Jihyae,Lee, Jeewoo,Lee, Jiyoun,Pearce, Larry V.,Pavlyukovets, Vladimir A.,Morgan, Matthew A.,Blumberg, Peter M.
-
scheme or table
p. 5227 - 5231
(2012/09/07)
-
- Application of hansch's model to capsaicinoids and capsinoids: A study using the quantitative structure-activity relationship. A novel method for the synthesis of capsinoids
-
We describe a synthetic approach for two families of compounds, the capsaicinoids and capsinoids, as part of a study of the quantitative relationship between structure and activity. A total of 14 capsaicinoids of increasing lateral chain lengths, from 2 to 16 carbon atoms, were synthesized. In addition, 14 capsinoids with identical lateral chains, as well as capsiate and dihydrocapsiate, have been synthesized, and a new method for the synthesis of these compounds has been developed. The yields range from 48.35 to 98.98%. It has been found that the synthetic capsaicinoids and capsinoids present a lipophilia similar to those of the natural compounds and present similar biological activity. The bioactivity of the synthetic capsaicinoids and capsinoids decreases proportionally to the degree of difference in lipophilia (higher or lower) compared to the natural compounds. Biological activity was determined using the etiolated wheat (Triticum aestlvum L.) coleoptiles bioassay and by comparing results of the synthesis with those presented by their counterpart natural compounds. The bioactivities found correlated directly to the lipophilic properties of the synthesized compounds.
- Barbero, Gerardo F.,Molinillo, Jose M. G.,Varela, Rosa M.,Palma, Miguel,MacIas, Francisco A.,Barroso, Carmelo G.
-
experimental part
p. 3342 - 3349
(2011/07/30)
-
- Highly efficient synthesis of capsaicin analogues by condensation of vanillylamine and acyl chlorides in a biphase H2O/CHCl3 system
-
Highly efficient synthesis of capsaicin analogues was developed using condensation of vanillylamine with acyl chlorides in a biphase H2O/CHCl3 system under mild conditions. For C4-C18 aliphatic or aromatic acyl chlorides, the yields were up to 93-96% with high purity after a simple work-up procedure, and only 1-1.16 equiv of acyl chloride was needed in the reaction.
- Wang, Bo,Yang, Fan,Shan, Yi-Fan,Qiu, Wen-Wei,Tang, Jie
-
supporting information; experimental part
p. 5409 - 5412
(2009/10/17)
-
- Vanilloids. 1. Analogs of Capsaicin with Antinociceptive and Antiinflammatory Activity
-
As part of a program to establish structure-activity relationships for vanilloids, analogs of the pungent principle capsaicin, the alkyl chain portion the parent structure (and related compounds derived from homovanillic acid) was varied.In antinociceptive and antiinflammatory assays (rat and mouse hot plate and croton oil-inflamed mouse ear), compounds with widely varying alkyl chain structures were active.Short-chain compounds were active by systemic administration in the assays mentioned above but they retained the high pungency and acute toxicity characteristic of capsaicin.In contrast, the long chain cis-unsaturates, NE-19550 (vanillyloleamide) and NE-28345 (oleylhomovanillamide), were orally active, less pungent, and less acutely toxic than capsaicin.The potential of these compounds as antiinflammatory/analgesic agents is discussed in light of recent data on the mechanism of action of vanilloids on sensory nerve fibers.
- Janusz, John M.,Buckwalter, Brian L.,Young, Patricia A.,LaHann, Thomas R.,Farmer, Ralph W.,et al.
-
p. 2595 - 2604
(2007/10/02)
-