Detail of "4977-62-2"

Reference

Reaction of acylamino cyano esters with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide leading to substituted aminothiazoles

Reaction of acylamino cyano esters with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide leading to substituted aminothiazoles. Crystal structure of 5-aminothiazole-4-carboxylic acid ethyl ester. Golankiewicz, Bozenna; Januszczyk, Piotr; Gdaniec, Maria; Kosturkiewicz, Zofia (Inst. Bioorg. Chem., Pol. Acad. Sci., Poznan 61-704, Pol.). Tetrahedron, 41(24), 5989-94 (English) 1985. CODEN: TETRAB. ISSN: 0040-4020. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Section cross-reference(s): 75 RCONHCH(CN)CO2Et (R = H, Me, Ph) react with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide (I) in refluxing benzene with formation of 2-alkyl (aryl)-5-aminothiazole-4-carboxylic acid Et esters II. Structure of II was established by spectroscopic means and an x-ray crystallog. investigation of II (R = H).Except for chemicals metioned above, 4977-62-2 and 55828-02-9 are also used. .

Synthesis and NMR spectral analysis of leucine -d

Synthesis and NMR spectral analysis of leucine -d.Some chemicals with cas registry numbers like 4977-62-2 and 20440-13-5 are also used.gamma.. Sogn, J. A.; Gibbons, W. A.; Wolff, S. (Rockefeller Univ., New York, N. Y., USA). Int. J. Pept. Protein Res., 8(5), 459-64 (English) 1976. CODEN: IJPPC3. DOCUMENT TYPE: Journal CA Section: 34 (Synthesis of Amino Acids, Peptides, and Proteins) Section cross-reference(s): 22 DL-Me2CDCH2CH(NH2)CO2H (I) was prepd. by treating Me2C:CH2 with B2D6 and NaOH-H2O2, tosylating the resulting Me2CDCH2OH, condensing with AcNHCH(CN)CO2Et, and hydrolyzing with HCl. The PMR of I may be completely assigned since I does not have a .gamma.-proton signal. The population of rotamers of I was calcd. from the PMR data. The potential usefulness of I as a probe in biol. peptides is discussed. .