184877-64-3Relevant articles and documents
Total synthesis of madindoline A
Hosokawa,Sekiguchi,Hayase,Hirukawa,Kobayashi
, p. 6435 - 6439 (2000)
The total synthesis of madindoline A was achieved. The key step of the synthesis is a reductive coupling of an acid-sensitive hydroxyfuroindoline derivative and a sterically hindered aldehyde using Sn(OTf)2-NaBH(OAc)3. After the redu
Determination of the absolute stereochemistry and asymmetric total synthesis of madindolines A and B: A practical improvement to a second-generation approach from the first-generation
Hirose, Tomoyasu,Sunazuka, Toshiaki,Yamamoto, Daisuke,Kojima, Naoto,Shirahata, Tatsuya,Harigaya, Yoshihiro,Kuwajima, Isao,Omura, Satoshi
, p. 6015 - 6039 (2005)
In this report, we describe an efficient, highly convergent, stereocontrolled first total synthesis and a second-generation synthesis of madindolines A 1 and B 2, potent selective inhibitors of interleukin 6. The key steps include (1) asymmetric oxidative ring-closure reaction of tryptophol 3 to construct a chiral 3a-hydroxyfuroindoline 4 using the modified Sharpless asymmetric epoxidation condition, (2) highly diastereoselective acylation to build up the quaternary carbon center, and (3) intramolecular acylation of ester 32 with allylsilanes to produce the full substituted cyclopentenedione units. Our first synthetic route defines for the first time both their relative and absolute configurations. Moreover, a more efficient second-generation synthesis was designed, which is suitable for gram-scale preparation of these compounds.
Synthetic applications of a three-component Mannich reaction. Total synthesis of IL-6 inhibitor (+)-madindoline A and B
Hirose, Tomoyasu,Sunazuka, Toshiaki,Yamamoto, Daisuke,Kaji, Eisuke,Omura, Satoshi
, p. 6761 - 6764 (2006)
A three-component Mannich reaction of 3a-hydroxyfuroindoline (3), β-ketoester and formaldehyde was employed as an efficient and concise method to synthesize naturally-occurring (+)-Madindolines A (1) and B (2). The scope and limitations of the Mannich rea
Synthesis of (+)-madindoline A and (+)-madindoline B
Wan, Lifeng,Tius, Marcus A.
, p. 647 - 650 (2008/02/05)
The allene ether version of the Nazarov cyclization was used to construct the cyclopentane dione portion of madindolines A and B. The racemic cyclopentane dione from the Nazarov cyclization was converted to an enol ether that was combined with the chiral,
Design, synthesis, and biological activities of madindoline analogues
Yamamoto, Daisuke,Sunazuka, Toshiaki,Hirose, Tomoyasu,Kojima, Naoto,Kaji, Eisuke,Omura, Satoshi
, p. 2807 - 2811 (2007/10/03)
A research program is under way to develop a series of madindoline-based inhibitors targeting interleukin 6. Such inhibitors will have potential use in fighting a variety of diseases for which no effective therapeutic drugs currently exist. Madindoline is