Chemistry Reference
In-Depth Information
(a)
A
B
C
(b)
OR
OR
O
OR
O
OR OR
O
OR
OR
O
O
OR
OR
O
OR
R = Butyroyl
PPM
200.0
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
(a)
13
C-NMR DEPT spectra of the: peracetyl (A), perbutyroyl (B) and
pervaleroyl (C) polyhydroxy triglyceride derivatives of milkweed oil.
(b)
Figure 10.3
13
C-NMR spectrum of
the perbutyroyl polyhydroxy triglyceride
derivative of milkweed oil.
inference would be a condensation step following the initial ring-opening
reaction of the epoxide. To confirm this postulate, toluene was added to the
reaction mixture in a subsequent ring-opening reaction in order to azeotrope
off any condensed water formed into a Dean-Stark trap. This was confirmed
by the quantity of water collected in the trap during the reaction. Thus the
resulting ring-opening of the oxirane gave a vicinal diformate ester for each
oxirane unit of the substrate. The FT-IR spectrum of the product shows a
