30979-53-4Relevant articles and documents
The cyclopropyl effect on the regioselectivity of coupling reactions involving the lithiation of 1-cyclopropyl-2-arylacetylenes
Ma, Shengming,He, Qiwen
, p. 2769 - 2778 (2006)
The cyclopropyl effect controlled the regioselectivity of the cross coupling reactions of propargylic/allenylic metallic species with electrophiles affording alkynic cyclopropanes. It was proposed that the strain in cyclopropyl ring, which makes the formation of vinylidenecyclopropanes unfavorable, determined the regioselectivity. Control experiment of i-propyl, cyclobutyl, and cyclohexyl- phenylacetylenes were conducted to support the above speculation.
Generation of allenic/propargylic zirconium complexes and subsequent cross-coupling reactions: A facile synthesis of multisubstituted allenes
Zhang, Hao,Fu, Xiaoping,Chen, Jingjin,Wang, Erjuan,Liu, Yuanhong,Li, Yuxue
supporting information; experimental part, p. 9351 - 9358 (2010/03/04)
(Chemical Equation Presented) The β-alkoxide elimination reaction of propargylic ether with Negishi reagent leads to allenes and/or alkynes after hydrolysis. The product distribution is highly dependent on the substitution pattern of starting propargylic