𝔖 Bobbio Scriptorium
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σ–π Chelation-controlled chemoselective ring openings of epoxides

✍ Scribed by Naoki Asao; Taisuke Kasahara; Yoshinori Yamamoto

Book ID
104231717
Publisher
Elsevier Science
Year
2001
Tongue
French
Weight
58 KB
Volume
42
Category
Article
ISSN
0040-4039

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✦ Synopsis

σ-π chelation (1 eq)

(1 eq)

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π–π Chelation controlled chemoselective
π–π Chelation controlled chemoselective conjugate addition of lithium dimethylcuprate
✍ Naoki Asao; Sunyoung Lee; Yoshinori Yamamoto 📂 Article 📅 2003 🏛 Elsevier Science 🌐 French ⚖ 196 KB

The conjugate addition of Me 2 CuLi to ethyl cinnamate derivatives bearing an alkynyl group at the ortho-position, took place preferentially in the presence of the corresponding a,b-unsaturated esters bearing an alkynyl group at the distal position or having no alkynyl groups. The observed chemosele