ChemInform Abstract: (2 + 2), (4 + 1), and (4 +2) Cycloaddition Reactions of Silylated Bisketenes.

✍ Scribed by J. D. COLOMVAKOS; I. EGLE; J. MA; D. L. POLE; T. T. TIDWELL; J. WARKENTIN

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 34 KB
• Volume: 28
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199719073

✦ Synopsis

1997 cycloaddition reactions cycloaddition reactions O 0070

19 -073

(2 + 2), (4 + 1), and (4 +2) Cycloaddition Reactions of Silylated Bisketenes. -The bisketene (I) is found to undergo (2 + 2) cycloaddition with Me-CHO, while with diazomethanes and the olefin (X) (4 +1) cycloaddition takes place. However, it does not react with other electrophilic dienophiles. The bisketene (XIV) also undergoes (4 + 1) cycloaddition with diazomethanes and with nucleophilic alkynes it leads to (4 + 2) cycloaddition products and/or spiro compounds. -(COLOMVAKOS,