Advantage has been taken of this in a neat synthesis of rosefuran (Scheme 116) 〈77HCA2085〉. 2-Lithiofurans are also available by halogen/lithium exchange and with 2,3-dihalo compounds this can be controlled to occur only at a 2-position 〈70BSF1838〉. 3-Lithiofuran is readily ...