MASAS

Crego, A. L., Diez-Masa, J. C., and Dabrio, M. V., Preparation of open tubular columns for reversed-phase liquid chromatography, Anal. Chem., 65, 1615, 1993. 

The chiral center would be installed from either Unear carbamate 15 or branched carbamate 16 via the asymmetric addition of malonate anion to the 7i-allyl Mo complex reported by Trost et al. [11] to afford the branched chiral malonate derivative 17. Decarboxylation of 17 should provide the mono-carboxylic acid 18. Masa-mune homologation with 18 affords our common precursor 14. Linear carbamate 15 was obtained from the corresponding cinnamic acid, and branched 16 was prepared in one pot from the corresponding aldehyde. 

Via Giuseppe La Masa 19, 20156 Milan, Italy e-mail nazanin.golbamaki marionegri.it... 

MV Dabrio, GP Blanch, A Cifuentes, JC Diez Masa, M de Frutos, M Herraiz, I Martinez de Castro, J Sanz Perucha. Cromatografia y Electroforesis en Columna. Barcelona Springer, 2000. 

It didn t matter — then it did. If I wasn t going to work, I should be at the hospital seeing Jan Charmatz. Charmatz, too, was teetering on a kind of window sill. Belle Mayer had written me that he had wanted to go to America, and I d been planning to help. He has to get out now. I thought — now, before he falls, as Jan Masa-ryk had lately "fallen" out a window in Prague. A silly fear He was perfectly safe here — wasn t he ... 

This chapter is dedicated to the memory of Professors Francis Petit and Hide-masa Takaya, two friends who have been pioneers in the field of homogeneous catalysis and enantioselective catalysis. 

In 1964, Mitsui et al.5 used a chiral auxiliary to achieve asymmetric aldol condensation, although the stereoselectivity was not high (58%) at that time. Significant improvement came in the early 1980s when Evans et al.6 and Masa-mune et al.7 introduced a series of chiral auxiliaries that led to high stereo-... 

Cifuentes A, Bernal JL, Diez-Masa JC (1997) Anal Chem 69 4271... 

Materia es todo aquello que tiene masa y ocupa un lugar en el espacio. 

El peso mide la cantidad de materia, asl como el efecto que la atraccidn gravitacional de la Tierra ejerce sobre la masa. 

Definir las unidades basicas del SI de tiempo, longitud, masa y temperatura. 

El volumen y la densidad son unidades derivadas. La densidad es la razdn entre la masa y el volumen. La densidad sirve para identificar una mues-tra de materia. 

La ley de conservacion de la masa establece que la masa no se crea, ni se destruye, sino que se conserva durante todo proceso. 

Distinguir entre las diferentes particulas sub-atdmicas, en tirminos de su carga relativa y su masa. 

---