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Construction of an efficient control system for the productivity of a rotary bucket excavator

โœ Scribed by M. M. Mandel'blat; M. I. Frenkel'

Publisher
Springer
Year
1965
Tongue
English
Weight
316 KB
Volume
1
Category
Article
ISSN
1573-8736

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๐Ÿ“œ SIMILAR VOLUMES

An efficient constructive method for a t
An efficient constructive method for a tricyclic system: an important intermediate for the synthesis of tricycloclavulone
โœ Hisanaka Ito; Tatsuya Kobayashi; Mineki Hasegawa; Kazuo Iguchi ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 117 KB

The tricyclic ring system of tricycloclavulone was synthesized from 2-methoxycarbonyl-2-cyclopenten-1-one (2). Key reactions include Lewis acid-catalyzed [2+2]-cycloaddition of a,b-unsaturated ester 2 with thioacetylene derivatives and construction of the A-ring by using the Grubbs catalyst.