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. Author manuscript; available in PMC: 2017 May 20.
Published in final edited form as: Org Lett. 2016 May 10;18(10):2371–2374. doi: 10.1021/acs.orglett.6b00815

Table 1.

Optimization of Alkenylation of 4-Pyridylmethyl Ethyl Ether with 2-Bromoprop-1-ene 2aa, b

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Pd source L Pd/L (mol %) base assay yield (%)
1 Pd(OAc)2 L1 10/15 LiN(SiMe3)2 78
2 Pd(OAc)2 L2 10/15 LiN(SiMe3)2 60
3 Pd(OAc)2 L3 10/15 LiN(SiMe3)2 59
4 Pd(OAc)2 L4 10/15 LiN(SiMe3)2 49
5 Pd(OAc)2 L1 2.5/3.75 LiN(SiMe3)2 75
6 [PdCl(allyl)]2 L1 2.5/3.75 LiN(SiMe3)2 74
7 Pd(dba)2 L1 2.5/3.75 LiN(SiMe3)2 88
8 Pd(dba)2 L1 2.5/5.0 LiN(SiMe3)2 88
9 Pd(dba)2 L1 2.5/2.5 LiN(SiMe3)2 96
10 Pd(dba)2 L1 2.5/2.5 NaN(SiMe3)2 60
11 Pd(dba)2 L1 1.0/1.0 LiN(SiMe3)2 95(94)c
12 Pd(dba)2 L1 0.5/0.5 LiN(SiMe3)2 77
a

Reactions conducted on a 0.1 mmol scale using 1 equiv of 1a, and 1.5 equiv of 2a.

b

Assay yields determined by 1H NMR spectroscopy of the crude reaction mixtures.

c

Isolated yield after chromatographic purification.