Siebers

W C, A Tempcz)rrk, R C Hawley and T Hendrickson 1990. Semianalytical Treatment of Solvation for Molecular Mechanics and Dynamics. Journal of the American Chemical Society 112 6127-6129. ensson M, S Humbel, R D J Froese, T Matsubara, S Sieber and K Morokuma 1996. ONIOM A Multilayered Integrated MO + MM Method for Geometry Optimisations and Single Point Energy Predictions. A Test for Diels-Alder Reactions and Pt(P(t-Bu)3)2 + H2 Oxidative Addition. Journal of Physical Chemistry 100 19357-19363. 

In 1882, Nencki and Sieber (98), condensing dibromopyruvic acid with thiourea, obtained a compound they named sulfuvinuric acid (Sulfuvinursaure), which was later demonstrated (99) to be a derivative of 2-aminothiazole. The same year Will (100) observed that the sulfur atom of 56 is masked to Pb(N03)2 and to alkalis. 

P. Sieber, R. H. Andreatta, K. Eisler, B. Kamber, B. Riniker, and H. Rink, Peptides Proceedings of the Fifth American Peptide Symposium, M. Goodman and J. Meienho-fer, Eds., Halsted Press, New York, 1977, pp. 543-545. 

The method described above is a modification of the process of Nencki and Sieber. Gallacetophenone has also been prepared by treating pyrogallol with acetyl chloride. ... 

If IR show CO bands then dissolve in CHCI2, wash with aqueous Na2C03 and H2O, dry over MgS04, filter, evaporate and wash the residue with cold Et20 and dry in vacuo. NMR (CDCI3) 8 7.00 (m 1H), 3.98 (bs 4H) and 3.80 (s Me). [Mcintoch and Sieber J Org Chem 43 4431 1978.]... 

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