1: methylmagnesium bromide With cis-2,10-dimethyl-lt;1,2,3gt;benzothiadiphosphololt;2,3-bgt;lt;1,2,3gt;benzothiadiphosphole in tetrahydrofuran
T=20°C;
2: Bromure de phenyl magnesium in tetrahydrofuran
T=20°C;
3: With hydrogenchloride in tetrahydrofuran