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STKK 6014: Nuclear Magnetic Resonance Spectroscopy (NMR) 

Proton and Carbon NMR Elucidation for Compounds

Extracted from styrax benzoin (styracaceae)

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Contents

Introduction1

Proton NMR2

Carbon NMR3

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Introduction

Compounds from styrax benzoin (styracaceae) Styrax species contain egonol (natural

benzofuran)- an effective pyrethrum synergist. (Takanashi & Takizawa, 1988)

The elucidation is done by using NMR 600MHz with deuterated chloroform (CDCl3) as solvent.

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1H NMR

Proton NMR (solvent:CDCl3)

H3H2

H2

H3

CHCl3

Proton NMR

OCH 3

H1

OCH 3

H1

H3H2

CHCl3

H3(2H,t) n=2J=7.8 Hz

OCH 3

(3H,s) n=0

H1(2H,t) n=2J=6.0 Hz

H2(2H,p) n=4

H15

H9

H10

H5

H17

H5

H17,J=7.8 Hz

H10

H9

H2H3

H1

OCH3

CHCl3

H15

H9

H10

H18

H13 H5

H18, J= 7.8,1.8 Hz

H13, J=1.8 HzCHCl3

H17

OCH3

H1

H3H2

H18

H17,J=7.8 Hz

H5

H10

H9

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13C NMR

C2

C3

C1C15

C12

C10 O-Me

C11

C-14

C-16

C8

C-7

C4

C6

C17C9

C5

C18

C13

CDCl3

Upward signals: CH2 and C4

Downward signals: CH and CH3

C2

C3

O-Me

C1

C15

C10

C13

C9C17 C5

C18

C12

C6

C4

C-7

C8C-14

C-16

C11

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