On stereochemistry of osmium tetraoxide oxidation of allylic alcohol systems. Empirical rule

Tetrahedron ◽  
1984 ◽  
Vol 40 (12) ◽  
pp. 2247-2255 ◽  
Author(s):  
J.K. Cha ◽  
W.J. Christ ◽  
Y. Kishi
2020 ◽  
Author(s):  
Hui Zhao ◽  
Kai Gao ◽  
Haichen Ma ◽  
Tsz Chun Yip ◽  
Wei-Min Dai

The C19–C30 bis-THF fragment of the proposed structure of iriomoteolide-13a has been synthesized. The w-mesyloxy-substituted stereotetrad possessing three continuous hydroxy groups was generated by <i>anti</i>-aldol reaction and asymmetric dihydroxylation (AD). Upon heating in pyridine the stereotetrad underwent an S<sub>N</sub>2 cyclization to form the C19–C22 THF ring. It was followed by an intramolecular <i>syn</i>-oxypalladation of the C28 chiral allylic alcohol to give the C23–C26 THF ring.


2014 ◽  
Vol 10 ◽  
pp. 1246-1254 ◽  
Author(s):  
Zbigniew Pakulski ◽  
Norbert Gajda ◽  
Magdalena Jawiczuk ◽  
Jadwiga Frelek ◽  
Piotr Cmoch ◽  
...  

The reaction of appropriately functionalized sucrose phosphonate with sucrose aldehyde afforded a dimer composed of two sucrose units connected via their C6-positions (‘the glucose ends’). The carbonyl group in this product (enone) was stereoselectively reduced with zinc borohydride and the double bond (after protection of the allylic alcohol formed after reduction) was oxidized with osmium tetroxide to a diol. Absolute configurations of the allylic alcohol as well as the diol were determined by circular dichroism (CD) spectroscopy using the in situ dimolybdenum methodology.


1986 ◽  
Vol 51 (21) ◽  
pp. 4028-4035 ◽  
Author(s):  
R. Marshall Wilson ◽  
Karlyn A. Schnapp ◽  
Richard K. Merwin ◽  
Revathi Ranganthan ◽  
David L. Moats ◽  
...  

2021 ◽  
Author(s):  
Herong chen ◽  
Zhijun Zhou ◽  
Wangqing Kong

Methanol is an abundant and renewable chemical raw material, but its use as a C1 source in C-C bond coupling reaction still constitutes a big challenge, and the known methods...


2002 ◽  
Vol 43 (6) ◽  
pp. 1043-1046 ◽  
Author(s):  
Isamu Matsuda ◽  
Shogo Wakamatsu ◽  
Ken-ichi Komori ◽  
Tatsuya Makino ◽  
Kenji Itoh

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