+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Synthetic studies on carbapenem antibiotics from penicillins v. a stereospecific preparation of 4 allylazetidinones

, : Synthetic studies on carbapenem antibiotics from penicillins v. a stereospecific preparation of 4 allylazetidinones. Heterocycles (Tokyo) 23(8): 1889-1892

A stereospecific preparation of chiral 4-allylazetidinones _3, key intermediates for the synthesis of the carbapenem antibiotics, has been achieved in good yields by reaction of 4-acetoxyazetidinones _2 with allylsilanes in the presence of TMSOTf.


Other references

Kolling, C., 1993: The composition of the soil solution in windthrown Norway spruce (Picea abies) forest ecosystems. The chemical composition of the soil solution at a depth of 50-80 cm was studied for 20 months, starting 13 months after windthrows in 13 Picea abies ecosystems in Germany. The results, presented in detail, indicate high or very high nitrate condi...

Ovchinnikov, Y.M.; Svistushkin, V.M.; Bezchinskaya, M.Y.; Klimova, L.A.; Morozova, S.V.; D'yakova, F.N.; Makeeva, N.S.; Slavskii, A.N., 1996: Low-energy laser radiation in diseases of the upper respiratory airways and ear. Vestnik Otorinolaringologii 0(3): 36-38

Nemes, J., 1992: Pesch bids for 2 affiliated hospitals. Modern Healthcare 22(50): 3-3

Karlin, S.; Feldman, M.W., 1978: Simultaneous Stability of D=0 and D not equal0 for Multiplicative Viabilities at Two Loci. The two-locus, two-allele multiplicative viability model is investigated. It is shown that the well-known region of recombination values for which D = 0 is locally stable does not preclude the local stability of an equilibrium with D not equal 0....

Iwanami I.S.; Nakazawa N.; Hashimoto S., 1977: Calculation of effective inactivation cross sections of bacterial cells for heavy ions and fast neutrons. Journal of Radiation Research 18(1): 12

Coaker, T.H.; Smith, J.L., 1970: Sterilisation of the cabbage root fly (Erioischia brassicae (Bch.)) (Dipt, Anthomyiidae) with tepa: laboratory and field cage tests. The following is based largely on the authors' summary. In experiments in central England, normal females of Hylemya (Erioischia) brassicae (Bch.) and females that had fed on 0.1% tepa in 10% sucrose solution during the second and third days...

Anonymous, 1962: Long-term agricultural policy; report of the Landbouwschap on future agricultural development in the Netherlands and agricultural policy to be pursued in connection with this development. A discussion on the expected development of agriculture, especially structural changes in production, demand and marketing, followed by an analysis of goals and means of agricultural policy.

Payne, D.F.; Rosenthal, D.; Lamis, P.A.; Stanton, P.E., 1985: Infrarenal aortic aneurysms. Asymptomatic versus symptomatic. Between 1978 and 1983, 103 patients underwent operations for infrarenal abdominal aortic aneurysms (AAA). Fifty-seven patients (group I) had elective procedures without a death and with a morbidity of 19 per cent. Thirty-three patients (group II)...

Woodward, S.T.omson, R., 1996: Micropropagation of the silk tassel bush, Garrya elliptica Dougl. Proliferating cultures of Garrya elliptica were established from shoot tip and nodal explants grown on woody plant medium containing benzyladenine. Optimum numbers of healthy shoots were induced on media containing 1.25 micromolar benzyladenine; h...

Adkison, M., D.; Peterman, R., M., 1996: Results of bayesian methods depend on details of implementation: An example of estimating salmon escapement goals. Bayesian methods have been proposed to estimate optimal escapement goals, using both knowledge about physical determinants of salmon productivity and stock-recruitment data. The Bayesian approach has several advantages over many traditional method...