ChemInform Abstract: Convergent and Stereoselective Method for Synthesis of O-Linked Oxepane Ring System by Intramolecular Radical Cyclization.

ChemInform ◽  
2010 ◽  
Vol 29 (29) ◽  
pp. no-no
Author(s):  
M. SASAKI ◽  
M. INOUE ◽  
T. NOGUCHI ◽  
A. TAKEICHI ◽  
K. TACHIBANA
Keyword(s):  
Ring System ◽  
Radical Cyclization ◽  
Stereoselective Method

Convergent and stereoselective method for synthesis of O -linked oxepane ring system by intramolecular radical cyclization

1998 ◽  
Vol 39 (18) ◽  
pp. 2783-2786 ◽  
Author(s):  
Makoto Sasaki ◽  
Masayuki Inoue ◽  
Tetsuji Noguchi ◽  
Atsuo Takeichi ◽  
Kazuo Tachibana
Keyword(s):  
Ring System ◽  
Radical Cyclization ◽  
Stereoselective Method

New Approach to the Steroid BCD-Ring System Using Tandem Radical Cyclization

1997 ◽  
Vol 62 (7) ◽  
pp. 1912-1913 ◽  
Author(s):  
Takashi Takahashi ◽  
Satoshi Tomida ◽  
Yasuharu Sakamoto ◽  
Haruo Yamada
Keyword(s):  
Ring System ◽  
Radical Cyclization ◽  
New Approach

Silylmethyl radical cyclization: new stereoselective method for 1,3-diol synthesis from allylic alcohols

1984 ◽  
Vol 49 (12) ◽  
pp. 2298-2300 ◽  
Author(s):  
Hisao Nishiyama ◽  
Toshio Kitajima ◽  
Makoto Matsumoto ◽  
Kenji Itoh
Keyword(s):  
Radical Cyclization ◽  
Allylic Alcohols ◽  
Stereoselective Method

ChemInform Abstract: New Approach to the Steroid BCD-Ring System Using Tandem Radical Cyclization.

ChemInform ◽  
2010 ◽  
Vol 28 (32) ◽  
pp. no-no
Author(s):  
T TAKAHASHI ◽  
S. TOMIDA ◽  
Y. SAKAMOTO ◽  
H. YAMADA
Keyword(s):  
Ring System ◽  
Radical Cyclization ◽  
New Approach

Synthetic studies on cyathin diterpenes - Total synthesis of (±)-allocyathin B3

2004 ◽  
Vol 82 (2) ◽  
pp. 254-267 ◽  
Author(s):  
Dale E Ward ◽  
Yuanzhu Gai ◽  
Qi Qiao ◽  
Jianheng Shen
Keyword(s):  
Total Synthesis ◽  
Ring System ◽  
Radical Cyclization ◽  
Isopropyl Group ◽  
Hydroxymethyl Group ◽  
Relative Stereochemistry ◽  
Synthetic Studies ◽  
Vinyl Triflate

The synthesis of racemic allocyathin B3 from an advanced intermediate possessing the ring system and relative stereochemistry but lacking the isopropyl and hydroxymethyl groups is reported. The isopropyl group was introduced by radical cyclization of a methyl propargyl acetal of an α-bromoketone and the hydroxymethyl group was generated by Pd-catalyzed carbonylation of a vinyl triflate. The route provides functionalized intermediates that could allow access to more complex members of the cyathin family of diterpenes. Several modifications and improvements to the procedures previously described for the synthesis of the advanced intermediate have been achieved.Key words: cyathin diterpenes, cyathanes, allocyathin B3.

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