Copper(I)-BINOL Catalyzed Domino Synthesis of 1,4-Benzoxathiines through 𝐂_{(𝐚𝐫𝐲𝐥)}-O Bond Formation

Table 1

Ligand screening for Cu-catalyzed domino reaction for the synthesis of 1,4-benzoxathiine moiety^a.

Entry	Ligand	Time (h)	Yield (%)^b
1	L1	80	12
2	L2	80	14
3	L3	80	11
4	L4	95	39
5	L5	80	62
6	L6	95	13
7	L7	72	19
8	L8	95	14
9	L9	80	16

^aReactions were carried out in pressure tube; ^bisolated yield.