QuestionAromatic substitution / aryne, tandem addition–cyclisation
The intermediate [X] and the major product [Y] formed in the following reaction are
- (a) [X] = aryl anion ortho to OMe, CH(Ph)CN meta to OMe; [Y] = 2-benzyl-3-cyano pattern (CH₂Ph ortho to OMe, CN next to CH₂OMe)
- (b) [X] = aryl anion ortho to OMe, CH(Ph)CN meta to OMe; [Y] = CN ortho to OMe, CH₂Ph next to CH₂OCH₃
- (c) [X] = CH(Ph)CN ortho to OMe, aryl anion meta to OMe; [Y] = CH₂Ph ortho to OMe, CN next to CH₂OMe
- (d) [X] = CH(Ph)CN ortho to OMe, aryl anion meta to OMe; [Y] = CN ortho to OMe, CH₂Ph next to CH₂OMe
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