. Author manuscript; available in PMC: 2019 Feb 5.

Published in final edited form as: Organometallics. 2018 Nov 30;37(24):4801–4809. doi: 10.1021/acs.organomet.8b00793

Table 3.

Product Distribution from Eq. 8 under Stoichiometric Conditions versus Protic Catalysis.^a,b

entry	Cp₂TiCl₂ (equiv)	Coll•HCl (equiv)	solvent	9 (%)	13 (%)	14 (%)
l^c	1.00	0.00	THF	100	0	0
2	0.25	1.50	THF	44	53	3
3^d	0.25	1.50	Et₂O	71	24	5
4	0.25	1.50	toluene	67	24	9

^a)

Reaction conditions 0.25 M, RT, 3.0 equiv Zn, 20 h unless otherwise indicated.

^b)

Product ratios determined by GC-MS and NMR.

^c)

Reaction complete in 15 min; gas evolution observed.

^d)

Reaction complete after 2.5 h.