Model Complexes of Manganese-Containing Metalloenzyme: Studies on Synthesis, Structure and Properties of Mn(Ⅲ),Mn(Ⅳ) and Mixed-Valence Multnuclear Manganese Complexes
STUDIES ON POLYCYCLIC COMPOUNDS Ⅳ. A SYNTHESIS OF 1-KETO-2-METHYL-2-CARBOMETHOXY-7-METHOXY-1,2,3,4,9,10-HEXAHYDROPHENANTHRENE FROM 6-METHOXY-α-TETRALONE
In the early 1960s research into radar signal synthesis produced important formulas describing the action of the two-dimensional Fourier transform on auto- and crossambiguity surfaces.
A new method for the synthesis of polyene acids has been described.This consists of the condensation of crotonic ester or sorbic ester with suitable alde- hydes,followed by hydrolysis.Thus a C4 or C6 side chain with conjugated double bonds can be introduced in a single step.Condensation of methyl cro- tonate with benzaldehyde and with furfural in the presence of alcohol-free sodium methoxide gives,after hydrolysis,cis-δ-phenyl-△~(αγ)-pentadienoic acid(m.p.137.5- 138°)and cis δ-2-furan-△~(αγ)-pentadien...
Karrer and Enslin reported that the structure of alstyrine (S_(19)H_(22)N_2), a selenium- dehydrogenation-degradation product obtained by Sharp from the alkaloid alstonine, is identical with that of corynanthyrine, α-[2-(4, 5 diethylpyridyl)]-β-ethylindole (Ⅱ), despite the fact that the melting points of these two substances have a 5°difference. In his investigation, the author of the present paper has synthesized two homologues of (II), α-(2-pyridyl)-β- methylindole (Ⅲ) and α-(2-pyridyl)-β-ethylindole (Ⅳ),...
γ-(6-Methoxy-2-carboxy-3,4-dihydro-l-naphthyl)-butyric acid was reduced in the presence of 5% Pd-C to the saturated acid, γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro- 1-naphthyl)-butyric acid, by the method of Bachmann and co-workers. From this reaction only one of the two diastereoisomers was obtained as the principal product. This acid was resolved into its optical antipodes with brucine in anhydrous methanol. The 1-γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro-1-naphthyl)-butyric acid-brucine salt, being...