A Quick, Clean and Green Synthesis of Methylenedioxyprecocene and other Chromenes over Basic Montmorillonite K10 Clay

On page 787, Table 2 was truncated such that entries 4-7 did not appear. The intact table is as follows:

Table 2 Reaction Scope Entry R1 R2 R3 R4 R5 R6 Product distribution (%) 9 7 Other 1 H -O(CH2)O- H H CH3 48 (9a) 11 41 2 H -O(CH2)O- H H H 7 (9b) 10 83 3 H OCH3 OCH3 H CH3 CH3 18 (9c) 68 14 4 Br H H H CH3 CH3 84 (9d) 6 10 5 H CH3 H H CH3 CH3 97 (9e) 0 3 6 H H CH3 H CH3 CH3 56 (9f) 0 44 7 H H H H CH3 CH3 70 (9g) 0 30

The editorial office apologizes for the omission.