MNPs@Cu-catalyzed synthesis of 2-amino-3-cyano-7,8-dihydro-4H-chromen-5(6H)-one (6)derivatives^a.

Entry	Product	RCHO (2)	Product	Time (min)	Yield (%)b	MP (obsd) (°C)	MP (lit.) (°C)
1	6a			17	91	232–234	234–23549
2	6b			15	94	216–219	214–21623
3	6c			15	92	180–182	179–18025
4	6d			15	95	207–210	198–20024
5	6e			15	93	212–214	215–21723
6	6f			20	94	229–231	228–23032
7	6g			15	92	208–211	207–20952
8	6h			15	95	207–209	210–21149
9	6i			15	92	225–229	227–23052
10	6j			25	91	217–220	220–22250
11	6k			25	90	203–205	201–20249
12	6l			20	92	223–225	224–22659
13	6m			25	94	237–239	238–24051
14	6n			20	92	209–211	210–21226

^aReaction conditions: dimedone (1 mmol), aldehyde (1 mmol), malononitrile (1.1 mmol), MNPs@Cu (10 mg).

^bThe yields refer to Isolated products.