5-Acetyl-DIBOA

We have therefore been interested in the synthesis of the corresponding aglucone 5-acetyl-2,4-dihydroxy-2//-l,4-benzoxazin-3(4i/)-one (5-acetyl-DIBOA). However, when the appropriate precursor 5-acetyl-4-hydroxy-2-methoxy-2//-l,4-benzoxazin-3(4/7)-one was subjected to a boron trichloride ether cleavage followed by hydrolysis with silver carbonate/water according to a reported method [110], the expected aglucone was not obtained. Instead of, 4-ABOA was isolated [121]. In... 

Fig. (13). Formation of 4-ABOA during an attempted synthesis of 5-acetyl-DIBOA...

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