20697-20-5Relevant articles and documents
Pilot in Vivo Structure-Activity Relationship of Dihydromethysticin in Blocking 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone-Induced O6-Methylguanine and Lung Tumor in A/J Mice
Puppala, Manohar,Narayanapillai, Sreekanth C.,Leitzman, Pablo,Sun, Haifeng,Upadhyaya, Pramod,O'Sullivan, M. Gerard,Hecht, Stephen S.,Xing, Chengguo
, p. 7935 - 7940 (2017/10/06)
(+)-Dihydromethysticin was recently identified as a promising lung cancer chemopreventive agent, while (+)-dihydrokavain was completely ineffective. A pilot in vivo structure-activity relationship (SAR) was explored, evaluating the efficacy of its analogs in blocking 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced short-term O6-methylguanine and long-term adenoma formation in the lung tissues in A/J mice. Both results revealed cohesive SARs, demonstrating that the methylenedioxy functional group in DHM is essential while the lactone functional group tolerates modifications.
Heck-matsuda arylation as a strategy to access kavalactones isolated from polygala sabulosa, piper methysticum, and analogues
Soldi, Cristian,Moro, Angelica V.,Pizzolatti, Moacir G.,Correia, Carlos R. D.
experimental part, p. 3607 - 3616 (2012/07/31)
Herein, we describe the total syntheses of three bioactive pyrones isolated from Polygala sabulosa (i.e., 1, 4, and 7) and eight isolated from Piper methysticum (i.e., 8-10, 13, 15, and 18-20) using the Heck-Matsuda arylation as the key strategy. The evaluation of this methodology by employing different arenediazonium tetrafluoroborates revealed that the Heck arylation was more efficient when the olefin undergoing arylation possessed the vinyl-2-pyrone structural unit instead of the vinyl dihydro-2-pyrone moiety. The Heck-Matsuda arylation of many of the examined olefins proceeded in a practical manner with total regio- and stereocontrol.
Economically viable efficient synthesis of (±)-methysticin: A component in kava potentially responsible for its cancer chemopreventive activity
Ali Shaik, Ahmad,Tan, Jonathan,Lue, Junxuan,Xing, Chengguo
, p. 137 - 145 (2012/09/21)
A highly efficient and green synthesis of (±)-methysticin was developed from inexpensive piperonal, requiring two extraction procedures and one chromatographic purification in the final step with 51% overall yield. This new method is superior compared to known literature procedures and is highly reproducible and scalable up to gram scale. ARKAT-USA, Inc.
Highly regio- and stereoselective Heck reaction of allylic esters with arenediazonium salts: Application to the synthesis of kavalactones
Moro, Angelica Venturini,Cardoso, Flavio Sega Pereira,Correia, Carlos Roque Duarte
supporting information; experimental part, p. 3642 - 3645 (2011/02/25)
Image Presented A highly efficient palladium-catalyzed Heck reaction of allylic esters with arenediazonium salts is described. The reaction proceeds under mild conditions, with excellent to total regio- and stereochemical control and with retention of the traditional leaving group. Furthermore, the generality of the present methodology is illustrated by the short total synthesis of the natural kavalactones, yangonine, (±)-methysticin, and (±)-dihydromethysticin.
Towards synthesis of kavalactone derivatives
Amaral, Patrícia A.,Gouault, Nicolas,Roch, Myriam Le,Eifler-Lima, Vera L.,David, Michèle
supporting information; experimental part, p. 6607 - 6609 (2009/04/06)
Kavalactone derivatives were synthesized using a Heck reaction of the 4-methoxy-6-vinyl-5,6-dihydropyran-2-one with aryl iodides. The Suzuki-Miyaura reaction of an aryl boronic acid and (Z)-4-methoxy-6-(2-iodovinyl)-5,6-dihydropyran-2-one has also been successfully used to produce both Z and E isomers of lactones.
