Water → HCID 11077426, compound

Participants

Reaction Steps

In a glove box, a 500 ml steel autoclave was charged with (E)-2-acetyl-1-(p-methoxybenzylidene)-1,2,3,4,5,6,7,8-octahydroisoquinoline (2.1 g, 7.06 mmol) (prepared according to example 2) 130 ml of methanol, a solution of (+)-CYBIPHEMP (8.2 mg, 0.0142 mmol) and [Ru(TFA)2 (COD)]2 --(H2O) (6.3 mg, 0.007 mmol) in 30 ml of methylene chloride and 5 ml of a solution of 0.0035 mmol of Ru(TFA)2 (BIPHEMP) in methanol. The hydrogenation was run at 100° and 60 bar for 5 h. Work-up as described in example 3 afforded 2.0 g of (S)-2-acetyl-1-(p-methoxybenzyl)-1,2,3,4,5,6,7,8-octahydroisoquinoline, [α]D20 =+45.9° (c=1, methanol), optical purity 86%: e.e. 88.3%.

Provenance & Evidence