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C2 symmetric amines. I. The asymmetric Ullmann synthesis of a new C2-symmetric binaphthyl

✍ Scribed by A.I Meyers; Marc J McKennon

Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
213 KB
Volume
36
Category
Article
ISSN
0040-4039

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Synthesis and chiroptical properties of
Synthesis and chiroptical properties of a novel C2-symmetric binaphthyl phosphortriamide (”chiral HMPAβ€œ)
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By use of an asymmetric Ullmann coupling involving chiral naphthalene oxazolines 1, the title compounds were prepared in good yields and with high diastereoselectivity. Hydrolysis of the binaphthyl oxazolines 2 led to the di-aldehydes 5, which were transformed into the azepine derivative, 6. The lat