scheme57

Scheme 57. Spirolactonization reaction of isatins 106 and HOBt esters of carboxylic acids 115. This figure is used with permission from the American Chemical Society[133].
Scheme 57. Spirolactonization reaction of isatins 106 and HOBt esters of carboxylic acids 115. This figure is used with permission from the American Chemical Society[133].
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