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Asymmetric cyclization–carbonylation of cyclic-2-methyl-2-propargyl-1,3-diols

✍ Scribed by Keisuke Kato; Maki Tanaka; Yasuhiro Yamamoto; Hiroyuki Akita

Publisher
Elsevier Science
Year
2002
Tongue
French
Weight
88 KB
Volume
43
Category
Article
ISSN
0040-4039

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The reaction of benzene-1,2-diol with various propargylic carbonates in the presence of a palladium catalyst and various chiral ligands afforded the corresponding 2-alkylidene-3-alkyl-2,3-dihydrobenzodioxins in quite good yields and enantioselectivities of up to 97%. The highest enantiomeric ex- [a]