Synthetic approaches to the ring system of Nicandra (benzenoid ring D) steroids

1986 ◽  
pp. 261 ◽  
Author(s):  
J. Blumbach ◽  
D. A. Hammond ◽  
D. A. Whiting
Keyword(s):  
Ring System ◽  
Synthetic Approaches ◽  
Benzenoid Ring

Diversity-Oriented Synthetic Approaches for Furoindoline: A Review

2019 ◽  
Vol 16 (3) ◽  
pp. 342-368 ◽  
Author(s):  
Ramandeep Kaur ◽  
Yagyesh Kapoor ◽  
Sundeep K. Manjal ◽  
Ravindra K. Rawal ◽  
Kapil Kumar
Keyword(s):  
Rheumatoid Arthritis ◽  
Cancer Cachexia ◽  
Biological Activities ◽  
Ring System ◽  
Synthetic Methods ◽  
Structural Units ◽  
Current Article ◽  
Tetrahydropyranyl Ether ◽  
Synthetic Approaches ◽  
Synthetic Target

The furo [2,3-b] indoline ring system is one of the most important structural units in various natural products. It has been known to have inherent biological activities and is utilized as a synthetic target for a number of natural compounds; therefore, this has contributed to a great demand for the growth of synthetic methods for this ring system. Most important compounds with furoindoline ring system are physovenine, madindoline A and B and makomotindoline etc. These compounds are well known to exhibit biological activity against different diseases such as glaucoma, cancer, cachexia, Castleman’s disease, rheumatoid arthritis, etc. The current article focuses on various synthetic approaches for furoindoline containing compounds and essential furoindoline moiety, such as oxindole-5-O-tetrahydropyranyl ether route etc., and various other diastereoand enantio- controlled approach in a very concise way.

Synthetic Approaches Toward Ecteinascidins. Part 2. Preparation of the ABCDE Ring System of Ecteinascidins Having Characteristic Substituents in Both Benzene Rings.

ChemInform ◽  
2003 ◽  
Vol 34 (50) ◽  
Author(s):  
Naoki Saito ◽  
Ryu-ichi Seki ◽  
Noriko Kameyama ◽  
Rie Sugimoto ◽  
Akinori Kubo
Keyword(s):  
Ring System ◽  
Benzene Rings ◽  
Synthetic Approaches

Cyclophanes. IV. Synthetic approaches to cyclophane dienes. The preparation of [2,2](2,7)Naphthalenophane-1,11-diene

1976 ◽  
Vol 29 (1) ◽  
pp. 163 ◽  
Author(s):  
JR Davy ◽  
JA Reiss
Keyword(s):  
Ring System ◽  
Ring Contraction ◽  
Stevens Rearrangement ◽  
Elimination Procedure ◽  
Synthetic Approaches ◽  
Hofmann Elimination

The synthesis of [2,2](2,7)naphthalenophane-1,ll-diene (2a) from 2,13-dithia[3,3](2,7)naphthalenophane (4) by means of a Stevens rearrangement ring contraction and a Hofmann elimination procedure is described. The diene was found to undergo an efficient oxidative photochemical cyclization to coronene. Several other reactions of the naphthalenophane ring system are described, and the stereochemistry of the macrocycle is discussed.

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