## Abstract Various 1,3βdiarylβ2βarylethynylβ1,3βbutadienes **7** have been prepared by the Pdβcatalyzed trimerization of arylalkynes **4**. Their structures and stereochemistry have been confirmed by Xβray crystal analyses. This procedure provides high regioselectivity to generate adducts __Z__β**
Utilization of Industrially Available 2,3-Dichloro-1,3-butadiene for Direct Synthesis of 2,3-Diaryl-1,3-butadienes.
β Scribed by Takakazu Yamamoto; Takuma Yasuda; Kazuaki Kobayashi; Isao Yamaguchi; Take-aki Koizumi; Daisuke Ishii; Masaru Nakagawa; Yoshihiro Mashiko; Norihiro Shimizu
- Publisher
- John Wiley and Sons
- Year
- 2006
- Weight
- 14 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0931-7597
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β¦ Synopsis
Abstract
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π SIMILAR VOLUMES
Dilithio-2,5-dimethyl-2,4-hexadiene (4a) rearranges to the cross-conjugated 2,5-dimethylhexadienediyl dianion 11a. A mechanistic investigation proves the intermolecularity of this rearrangement, which is also observed when starting from 4b. The 3-lithio-2,5-dimethylhexadienyl anion 10a with