The title compound [systematic name: [(1α,14α,16β)-20-ethyl-8,9,10-trihy-droxy-1,14,16-tri-meth-oxy-aconitan-4-yl 2-amino-benzoate], C30H42N2O8, a natural C19-diterpenoid alkaloid, possesses an aconitane carbon skeleton with four six-membered rings and two five-membered rings. The fused ring system contains two chair, one boat, one twist-boat and two envelope conformations. Intra-molecular N-H⋯...

The rhodium-catalyzed, directed catalytic asymmetric hydroboration of γ,δ-unsaturated amides affords a direct route to chiral acyclic secondary γ-borylated carbonyl derivatives in high enantiomeric purity. In contrast to a similar β-borylated amide derivative, the γ-borylated amide undergoes Suzuki-Miyaura cross-coupling with stereoretention. The utility of the boronic ester products is further...

The core moiety of ritonavir (2S, 3S, 5S)-5-(tertbutyloxycarbonyl)amino-2-amino-3-hydroxy-1,6-diphenylhexane (7) on condensation with oxirane of carbazole (8) in isopropyl alcohol at reflux and deprotected with mineral acid gave compound 10. Coupling of compound 10 with carbamate amino acid (11a-15c) in the presence of EDAC.HCl and HOBt at room temperature gave ritonavir analogues containing ca...

The title compound, C 12 H 15 NO 3 , crystallizes with Z ′ = 2 in space group Pca 1 the two independent molecules having almost same conformation, differing mostly at end of butanamide chain. A local inversion center near 1/8, 3/4, z relates molecules, as is common for structures this 2. molecule keto tautomer, and β-diketone moieties are twisted out planarity, O—C...C—O pseudo torsion angles −...

A highly efficient electroallylation of carbonyl compounds in aqueous electrolyte in a divided cell with a catalytic amount of zinc consumption is reported.

We have reported that the reaction of ethyl bromodifluoroacetate (1) with alkenyl iodides in the presence of copper powder gives ethyl alkenyldifluoroacetates. As an extension of this reaction, reaction of 1 with Michael acceptors in the presence of copper powder was examined and found to give 1,4-addition products selectively, unless the acceptor has a group stabilizing a radical intermediate,...

A highly active organocatalyst for alcohol oxidation has been developed. 9-Azanoradamantane N-oxyl (Nor-AZADO 4), constituting an unhindered, stable nitroxyl radical, exhibits superior catalytic activity to 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and AZADOs in the oxidation of alcohols to their corresponding carbonyl compounds.