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Accoun ts Letters - Thieme Chemistry

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Table of Conten<strong>ts</strong> IX<br />

1292<br />

Highly Enantioselective Synthesis of Substituted<br />

Piperidines using the Chiral Lithium Amide Base<br />

Approach<br />

N. J. Goldspink, N. S. Simpkins, M. Beckmann<br />

1295<br />

<strong>Chemistry</strong> of Insect Antifeedan<strong>ts</strong> from Azadirachta<br />

indica (Part 22): Functionalisation of the Decalin<br />

Fragment of Azadirachtin via a Claisen Rearrangement<br />

Reaction<br />

S. V. Ley, C. E. Gutteridge, A. R. Pape, C. D. Spilling,<br />

C. Zumbrunn<br />

1298<br />

The Baker’s Yeast Reduction of the b-Keto Aldehydes<br />

in the Presence of a Sulfur Compound<br />

R. Hayakawa, M. Shimizu<br />

1301<br />

N-Carboalkoxy-2-Nitrobenzenesulfonamides:<br />

A Practical Preparation of N-Boc-, N-Alloc-, and<br />

N-Cbz-Protected Primary Amines<br />

T. Fukuyama, M. Cheung, T. Kan<br />

1304<br />

Triazenes: A Useful Protecting Strategy for Sensitive<br />

Secondary Amines<br />

R. Lazny, J. Poplawski, J. Köbberling, D. Enders, S. Bräse<br />

1307<br />

Diastereoselectivity in Michael Additions to a<br />

Pyrrolidinyl Enone<br />

R. W. Bates, P. Kongsaeree<br />

MeO2C<br />

TESO<br />

MeO2C R 1<br />

N CO2Me<br />

Bn<br />

H<br />

O<br />

Ph<br />

MeO2C TESO<br />

O OBnR2<br />

O<br />

Ph<br />

N<br />

Li<br />

Ph<br />

N<br />

Li Ph<br />

THF, -78 °C<br />

electrophile<br />

(≥ 98% ee)<br />

R 1<br />

O OH<br />

H<br />

R2 R1 O<br />

OH<br />

R2 R1 OH<br />

R2 Baker's Yeast<br />

Sulfur-Compound<br />

N<br />

O Ot DAST<br />

CH2F Bu<br />

∆<br />

MeO 2C<br />

TESO<br />

MeO2C H<br />

O<br />

N CO2Me<br />

Bn E<br />

MeO2C<br />

TESO<br />

O OBn<br />

R2 R<br />

OH<br />

1<br />

N<br />

O Ot CH2OH DAST<br />

Bu<br />

OH<br />

R 2<br />

O<br />

OH<br />

N O<br />

O<br />

R 1<br />

<strong>Letters</strong>

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