Barger

Miiiiken J, Dominguez D D, Neison H H and Barger W R 1992 inoorporation of Cgg in Langmuir-Biodgett fiims Chem. Mater. 4 252-4... 

H. Wohltjen, A. W. Snow, W. R. Barger, D. S. BaUantine, IEEE Trans. Ultrason., Ferroelec., Ereq. Ctrl UFFC-34, 172 (1987). 

The variations in alkaloids recorded for this species have been stated already (p. 66). The following account refers to four alkaloids (Barger et al., ref. 23, p. 68) which have so far been observed only in this species Tigloidine, The hydrobromide of this syrupy base forms... 

Barger and Weitnauer pointed out that rcemerine is probably identical with iV-methylanonaine (p. 318) the position of the methylenedioxy group in rcemerine was at that time uncertain. 

Barger and Sargent have pointed out that artabotrinine (p. 319), may be identieal with anolobine methyl ether (V HO - MeO). 

A-methylanonaine, prepared from the natural alkaloid by the action of formaldehyde and formic acid, was isolated as the hydriodide, m.p. 246-7° (dec.). dZ-A-methylanonaine was also synthesised and characterised as the hydriodide, m.p. 244° (dec.), and methiodide, m.p. 210-1°. It is regarded as identical with dZ-rcemerine (p. 314), and it may be noted that the melting-point of the Hofmann degradation product of rcemerine is very similar to that of anonaine (IV NMe NH) (Barger and Weitnauer). "... 

Laurelia Novce-Zelandce. From tbe bark of tbis New Zealand tree known locally as pukatea, Aston isolated three alkaloids which have been further investigated by Barger, Girardet and Schlittler, to whom knowledge of their structure is due. ... 

Barger el al. took the view that the alkaloid contains two tryptamine residues, one represented in the degradation products by -methyltrypt-amine, and the other by methyl-3-carboline, and on this basis proposed formula (II). Manske and Marion, on the contrary, regard 2V-methyl-tryptamine and 3-carboline as originating from the same moiety of the molecule, the other half being represented by 4-methylquinoline, and on this conception based formula (III). 

The first indication of the nature of the nuclear structure of yohimbine was seciu-ed by Barger and Field,(1915) who, by distilling the alkaloid with soda-lime, obtained a base, (m.p. 56° picrate, m.p. 157°),... 

For detailed information on ergot the late Professor G. Barger s monograph 11931) should be consulted. ... 

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