Development of drug intermediates by using direct organocatalytic multi-component reactions
作者:Dhevalapally B. Ramachary、M. Kishor、G. Babul Reddy
DOI:10.1039/b602696f
日期:——
Novel, economic and environmentally friendly one-pot three-component Knoevenagel/hydrogenation (K/H) and four-component Knoevenagel/hydrogenation/alkylation (K/H/A) reactions of ketones, CH-acids, dihydropyridines and alkyl halides using proline and proline/metal carbonate catalysis, respectively, have been developed. Many of the products of these K/H and K/H/A reactions have direct applications in pharmaceutical chemistry.
Development of Pharmaceutical Drugs, Drug Intermediates and Ingredients by Using Direct Organo-Click Reactions
作者:Dhevalapally B. Ramachary、Mamillapalli Kishor、Y. Vijayendar Reddy
DOI:10.1002/ejoc.200701014
日期:2008.2
two-carbon homologation through cascade O/H/H reactions of aldehydes 1, Meldrum's acid (3c), Hantzsch ester (4) and acetic acid/triethylamine in ethanol has been demonstrated. Additionally, we have developed a green synthesis of the highly substituted 1,2,3-triazole 17 from simple substrates through a two-step combination of olefination/hydrogenation/alkylation and Huisgen cycloaddition reaction sequences
ROSENFELD, M. J.;SHANKAR, B. K. RAVI;SHECHTER, H., J. ORG. CHEM., 53,(1988) N 12, 2699-2705
作者:ROSENFELD, M. J.、SHANKAR, B. K. RAVI、SHECHTER, H.
DOI:——
日期:——
Rhodium(II) acetate-catalyzed reactions of 2-diazo-1,3-indandione and 2-diazo-1-indanone with various substrates
作者:M. J. Rosenfeld、B. K. Ravi Shankar、H. Shechter
DOI:10.1021/jo00247a007
日期:1988.6
Rapid Access to Substituted Indenones through Grignard Reaction and Its Application in the Synthesis of Fluorenones Using Ring Closing Metathesis
作者:Nabin Parui、Tirtha Mandal、Jyotirmayee Dash
DOI:10.1002/ejoc.202201285
日期:2023.2.13
Indenones are synthesized using a practical and scalable method. The addition of Grignard reagents to indene-1,3-diones provides 2,3-disubstituted indenones through dehydrative aromatization. Significantly, a naturally occurring neo-lignan has been synthesised in one pot. Moreover, diallyl indenones have been utilized as ring-closing metathesis (RCM) precursors for synthesising fluorenones through