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Murahashi coupling
Overview
The Murahashi Coupling is a cross coupling reaction. The coupling partners are organolithiums and organic halides. Transition metal catalysts are required. The reaction was first reported by Shun-Ichi Murahashi in 1974. This reaction is notable for using organolithiums as opposed to other cross-coupling reactions which utilize various metal-carbon compounds (metal = tin, magnesium, boron, silicon, zinc). Since the production of these other coupling reagents relies heavily upon organolithiums (especially in the case of organozinc and organomagnesium compounds), in bypassing these intermediates, this process is much more efficient. It has further been shown that the Murahashi reaction proceeds with greater selectivity, faster reaction times, and lower reaction temperatures than other similar coupling reactions while maintaining similar or higher yields.
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