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Gowrisankar, Saravanan,Lee, Ka-Young,Kim, Jae-Nyoung Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.4
Synthesis of 4-substituted 3-exo-methylenechroman derivatives was carried out by the n-Bu3SnH-mediated vinyl radical cyclization as the key step starting from various salicylaldehydes.