Mechanistic implications of 1, 3, 2. lambda. 5-dioxaphospholanes in

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J. Org. Chem., Vol. 54, No. 20,

Additions and Corrections

1989

Additions and Corrections Vol. 54, 1989 Anne Pautard-Cooper and Slayton A. Evans, Jr.*. Mechanistic Implications of 1,3,2X5-Dioxaphospholanes in the Mitsunobu Reaction. Page 2486. Unrevised Schemes I and I1 were printed. The revised schemes are shown below. Scheme I

+ PhCOOH

Ph3P

+ R’O,CN=NCO,R’

--

R

+ -

I

/

k

-(R’o,cNH-)~

Ph3P-N-N-C02R’

I

COpR’

HO

OH

3

R = Me, Ph

2

0 II PhCO \ HO

R

OH

-TPPO PhCOO-

Scheme I1

+ -

TPP R’O,CN=NCO~R‘

--.-

Ph3P-N-NCOpR’

2

I

COpR’

2R20H, patha

- (R’O~CNH-),

3

OR2 / Ph3P

2 +OH,

path c

+

H

I

Ph3P-N-NC0,R‘

x-