Monobenzylation Of 1,<i>n</i>-Diols via Dibutylstannylene Intermediates
作者:Eugene A. Mash、Liza T. A. Kantor、Stephen C. Waller
DOI:10.1080/00397919708006052
日期:1997.2
Symmetrical primary 1,n-diols, HO(CH2)(n)OH, of any chain length from n = 2-10, can be selectively monobenzylated via sequential treatment with dibutyltin oxide and benzyl bromide.
Edelson-Averbukh, Marina; Etinger, Alexander; Mandelbaum, Asher, Journal of the Chemical Society. Perkin Transactions 2 (2001), 1999, # 6, p. 1095 - 1105
Total synthesis of sulfobacin A (flavocristamide B)
作者:Naoko Irako、Takayuki Shioiri
DOI:10.1016/s0040-4039(98)01177-0
日期:1998.8
Sulfobacin A (1), a novel von Willebrand factor receptor antagonist isolated from the culture broth of Chryseobacterium sp. NR 2993, was efficiently synthesized for the first time. (C) 1998 Elsevier Science Ltd. All rights reserved.
The First Total Synthesis of (+)-Bullatacin, a Potent Antitumor Annonaceous Acetogenin, and (+)-(15,24)-bis-epi-Bullatacin
This paper reports the first total synthesis of the natural product (+)-bullatacin (1), a representative of potent antitumor Annonaceous acetogenins, as well as a stereoisomer (+)-(15,24)-bisepi-bullatacin (2). In this synthesis, a new, efficient method has been developed to introduce the gamma-lactone into the bistetrahydrofuran skeleton through in situ alkylation of epoxide 4 by the alpha-sulfonyl carbanion of phenyl sulfone 5. The methylated gamma-lactone was successfully synthesized by a sequence of reactions comprising an aldol reaction, an acidic lactonization, and elimination under mild, basic condition.