Table 4. Reaction conditions and yields for arylidene reduction (10 → 3).

Compound	Additive	Solvent	t, min	Yield, %
3a	AcOH	CHCl3	60	75
3b	NaOH	DCM : EtOH = 1 : 5	5	88
3c	NaOH	DCM : EtOH = 10 : 3	5	90
3d	AcOH	DCM	30	95
3e	NaOH	DCM : EtOH = 1 : 1	5	45
3f	NaOH	DCM : EtOH = 1 : 3	5	89
3g	AcOH	DCM	90	81
3h	NaOH	DCM : EtOH = 1 : 2	5	83
3i	NaOH	DCM : EtOH = 1 : 4	5	65