Table 2.

Exploration of various electrophiles for the MAP reaction

Entry	Electrophile	Homoallylic Vinyl Ether	Major Product	Yield (%)	dr (Br) eq:axa	dr (OR)
1				64	>95:5	1:1
2				44	74:26	1:1
3				71	89:11	7:3b,c
4				61	95:5	–
5				65	88:12	1:1
6				36	82:18	1:1
7				23	80:20	1:1
8				90	92:8	7:3d

^aRatios determined by integration of the crude ¹H NMR spectra.

^bRatio determined by HPLC analysis of the crude material.

^cStereochemistry of the major isomer determined by removal of the chiral auxiliary and formation/analysis of both MPTA ester diastereomers.

^dRatio of isolated products.