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Development of a geotechnical method for working a carbonate iron-ore deposit with preparation of the ore at the extraction site

✍ Scribed by V. A. Shchelkanov; A. I. Medvedev; A. V. Bulgakov

Publisher
Springer
Year
1972
Tongue
English
Weight
144 KB
Volume
8
Category
Article
ISSN
1573-8736

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## Abstract This paper describes a new method for the highly stereoselective preparation of dithymidine phosphorothioates (TpsT) with the (__R__) or the (__S__) configuration at the stereogenic phosphorus atom [(__R__p)‐ or (__S__p)‐TpsT, respectively], together with the synthesis of oligodeoxyribo