ChemInform Abstract: Adamantylation of N-Unsubstituted Pyrazole Derivatives: Mechanistic and Structural Studies

Autor:	Isabelle Forfar, Rosa M. Claramunt, C. Foces‐Foces, José Elguero, Pilar Cabildo, Antonio L. Llamas-Saiz
Rok vydání:	2010
Předmět:	Crystal Crystallography chemistry.chemical_compound Stereochemistry Chemistry Hydrogen bond Intermolecular force Molecule General Medicine Pyrazole Alpha helix Autoclave
Zdroj:	ChemInform. 25
ISSN:	0931-7597
DOI:	10.1002/chin.199443141
Popis:	Reaction of NH-pyrazoles with 1 -bromoadamantane in a high pressure stainless steel autoclave gives regioselectively 1-(1 -adamantyl)or 4-(1-adamantyl)pyrazoles depending on the temperature. A series of cross-experiments allows to establish the mechanism of this reaction. The molecular structure of the most simple derivative, 4-(1-adamantyl) pyrazole (3a), has been determined. Intermolecular N−H...N hydrogen bonds hold the four independent molecules together in a helix system parallel to the c axis. The crystal is built up of two centrosymmetrically related helices
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ce71603ba3995d4ef864bf43cf10ff2 https://doi.org/10.1002/chin.199443141 Zobrazit plný text záznamu Plný text