Schmidt Reaction of E-3-Benzylidenechromanones and E-3-Benzylidenethiochromanones

Table 1

Results of Schmidt reaction of E-3-benzylidenechromanones (2) and E-3-benzylidenethiochromanones (4) with NaN₃/c. H₂SO₄-HOAc.

Entry	Substrate	Product	Yield (%)
1	2a	4a	32
2	2b	4b	34
3	2c	4c	33
4	2d	4d	31
5	2e	4e	38
6	2f	4f	33
7	2g	—	—
8	2h	—	—
9	3a	5a	30
10	3b	5b	32
11	3c	—	—