A new sealing ring for the bearing of a high-speed cone drill bit
β Scribed by Yu. I. Babei; B. P. Chaikovskii
- Publisher
- Springer
- Year
- 1984
- Tongue
- English
- Weight
- 223 KB
- Volume
- 19
- Category
- Article
- ISSN
- 1573-885X
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π SIMILAR VOLUMES
Nitroethylenes bearing either a phenylthio or a phenylselenoether group in b-position are efficient synthetic equivalents of nitroacetylene. A [4+2] cycloaddition/carbenoid-mediated elimination of PhS(e)CH 3 /[4+2] cycloaddition sequence of reactions is shown to produce formal biscycloadducts of nit
Notes and Comments.
Complimentary solid phase syntheses of the Freidinger lactam class of 13-turn mimetics have been developed using ring closing metathesis as both the key carbon-carbon bond forming step and the cyclative cleavage mechanism. Solid phase variants of the Fukuyarna-Mitsunobu proce/ss were utilized as par