Table 2.

Kabachnik–Fields reactions carried out without the use of a solvent and a catalyst under MW irradiation [25].

Entry	R1	R2	R3	Y	Product	T (°C)	Yield (%)	Yield (%) of catalytic methods [ref.] †
1	Ph	H	H	EtO	8a	80 a	91
						100 b
2	Ph	H	H	MeO	8b	80 a	80
						80 b
3	Ph	H	H	Ph	8c	80	94
4	Bn	H	H	EtO	8d	100	81
5	Bn	H	H	Ph	8e	80	88
6	Ph	H	Ph	EtO	8f	100	93	98 [27], 85 [28], ~95 [29], 88 [30], 79 [31], 93 [32], 92 [33], ~90 [34], 96 [35], 60 [36], 86 [37], 92 [38]
7	Ph	H	Ph	MeO	8g	100	86	98 [24], 98 [27], 92 [33]
8	Ph	H	Ph	Ph	8h	80	87
9	Bn	H	Ph	EtO	8i	100	83	99 [28], 84 [29], 92 [30], 85 [31], 91 [32], 91 [33], 92 [35], 92 [36], 93 [38]
10	Bn	H	Ph	MeO	8j	100	87	95 [27], 82 [33]
11	Ph	Me	Ph	EtO	8k	120	80	75 [27], 74 [30], 63 [35], 18 [36]
12	Bn	Me	Ph	EtO	8l	120	84	92 [26], 80 [27], 81 [38]
13	Bn	Me	Ph	Ph	8m	100 a	80
						120 b	80
14	Ph			EtO	8n	120	81	92 [27], ~72 [29], 86 [30], 47 [31], 87 [37]
15	Bn			EtO	8o	120	91	85 [26], 90 [27], 83 [31], 80 [33], 85 [38]
16	Bn			MeO	8p	120	85	92 [27]
17	Bn			Ph	8q	100 a	80
						120 b

^† for details see Table 3; ^a condensation of the oxo-component and the amine; ^b addition of the >P(O)H species to the Schiff-base.