Processes and intermediates for preparing substituted chromanol derivatives

A compound of the formula

• or the enantiomer of said compound, wherein X is attached at position 4 or 5 of the phenyl moiety;
• R1 is —(CH2)qCHR5R6 wherein q is 0 to 4;
• each R2 is independently selected from the group consisting of H, fluoro, chloro, C1-C6 alkyl, C1-C6 alkoxy, phenylsulfinyl, phenylsulfonyl, and —S(O)n, (C1-C6 alkyl) wherein n is 0 to 2, and wherein said alkyl group, the alkyl moiety of said alkoxy and —S(O)n(C1-C6 alkyl) groups, and the phenyl moiety of said phenylsulfinyl and phenylsulfonyl groups are optionally substituted by 1 to 3 fluoro groups;
• R5 is H, C1-C6 alkyl, or phenyl substituted by R2;
• R6 is H, C1-C6 alkyl, C3-C8 cycloalkyl, C6-C10 aryl, or 5-10 membered heteroaryl, wherein said aryl and heteroaryl groups are optionally substituted by 1 or 2 substituents independently-selected from phenyl, R2, and phenyl substituted by 1 or 2 R2;
• X is halo;
• Y is halo or nitro;
• and,
• Xc is a chiral auxiliary.