Intramolecular [2 + 2] cycloaddition reactions of ketene and carbonyl groups. A new synthesis of benzofurans
1986 ◽
Vol 51
(11)
◽
pp. 2145-2147
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1995 ◽
Vol 60
(25)
◽
pp. 8209-8217
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1985 ◽
Vol 50
(4)
◽
pp. 531-534
◽
1980 ◽
Vol 10
(3)
◽
pp. 233-239
◽