Contrasting reactivity in Lewis acid-promoted reactions of thio- and silyl-allenes with 1,4-benzoquinones

  • Engler T
  • Agrios K
  • Reddy J
 et al. 
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In Ti(IV)-promoted reactions with 2-methoxy-1,4-benzoquinones 3, thioallenes 1 give 2 + 2 and/or 3 + 2 products via attack on a C = C moiety of the quinone, whereas silylallene 2 gives products derived from attack on a carbonyl group of the quinone.

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  • Thomas A. Engler

  • Konstantinos Agrios

  • Jayachandra P. Reddy

  • Rajesh Iyengar

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