Journal
ARKIVOC
Volume -, Issue -, Pages 1-7Publisher
ARKAT USA INC
DOI: 10.3998/ark.5550190.0008.d01
Keywords
thioxanthone; thiosalicylic acid; crown ether
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The reaction of thiosalicylic acid (TSA) and benzocrown ethers in concentrated sulfuric acid affords a general and efficient way to prepare thioxanthone crown ethers. This chemistry presumably proceeds by intermolecular sulfur electrophilic reaction and subsequently intramolecular electrophilic cyclization. Most of the reactions show high regioselectivity in good yields.
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