WebDec 24, 1993 · A series of C-9 beta-substituted artemisinin analogs (2-21) were synthesized via dianion alkylation of the total synthetic intermediate 57 followed by subsequent ozonolysis/acidification, or by alkylation of the enolate derived from (+)-9-desmethylartemisinin, 2. Inactive acyclic analogs 22 and 23 w … WebJul 25, 1994 · The dianion of (1 R ), (2 S )-cyclohexane-1,2-dicarboxylic acid mono- (−)-menthyl ester reacts with alkyl bromides and an iodide to give alkylation with selectivities ranging from 7:1 to 32:1, the configuration of one product has …
The phenylacetone dianion: alkylation with iodomethane
WebAug 3, 2012 · Mechanisms of alkylation by PhCH(2)Cl or CH(3)I in THF and of deuteriation by DCl (4 N in D(2)O) in THF or THF-toluene of lithiated phenylacetonitrile monoanions … WebApr 12, 2024 · 1 Alkylation of Icosahedral Carboranes and Related Reactions. Recent studies of the electrophilic methylation of p-carborane with methyl triflate in triflic acid have led to the novel decamethyl, ... One-electron oxidation of the dianion affords the bright blue paramagnetic and air-stable [closo-B 12 (CH 3) 12] ... churchill chair restoration hardware
Highly Alkylated Carborane Icosahedral [closo-B12H12]2−
WebDianion definition: (chemistry) Any anion carrying two negative charges. WebDiastereoselective alkylation of the dianion of 5-ethoxy-4(S)-hydroxy-1-isopropyl-2-pyrrolidinone; Synthesis of enantiomerically pure azabicycles. Tetrahedron Letters 1987 , 28 (14) , 1581-1584. WebProcess for preparing sultams from alkanesufonyl halides and haloalkylamines via intramolecular dianion alkylation of N-(haloalkyl)alkanesulfonamides, and application to the preparation of naph WO ... churchill chairs ltd