Catalytic hydrophosphorylation of alkyl- and acylhydrazones
作者:E. D. Matveeva、T. A. Podrugina、I. N. Kolesnikova、M. V. Prisyazhnoi、G. G. Karateev、N. S. Zefirov
DOI:10.1007/s11172-010-0095-2
日期:2010.2
N-Boc- and N-acylhydrazino phosphonates were obtained for the first time by hydrophosphorylation of the appropriate hydrazones of aliphatic and aromatic aldehydes and heterocyclic and aliphatic ketones in the presence of [tetra(tert-butyl)phthalocyanine]aluminum chloride as a catalyst.
Synthesis, biological evaluation, and structural studies on N1 and C5 substituted cycloalkyl analogues of the pyrazole class of CB1 and CB2 ligands
作者:Mathangi Krishnamurthy、Wei Li、Bob M Moore
DOI:10.1016/j.bmc.2003.10.045
日期:2004.1
A series of N1 and C5 substituted cycloalkyl and C5 4-methylphenyl analogues of the N-(piperidin-1-yl)-4-methyl-1H-pyrazole-3-carboxamide class of cannabinoid ligands were synthesized. The analogues were evaluated for CB1 and CB2 receptor binding affinities and receptor subtype selectivity. The effects of pyrazole substitution on ligand conformation and as such receptor affinities was not readily apparent;
new twist: A one‐pot nitrous acid free, diazonium‐free, and transition‐metal‐free variation of the Fischer indole synthesis has been developed. Condensation of quinone monoketals and aliphatic hydrazine hydrochlorides afforded indoles via intermediate alkylaryldiazenes. This method will complement the classical Fischer indole synthesis by providing indoles in two steps from widely available phenols