Total Synthesis of Prostaglandin 15d-PGJ2 and Investigation of its Effect on the Secretion of IL-6 and IL-12
摘要:
An efficient synthesis of 15-deoxy-Delta 12,14-prostaglandin J(2) (15d-PGJ(2), 1) is reported. The route described allows for diversification of the parent structure to prepare seven analogues of 1 in which the positioning of electrophilic sites is varied. These analogues were tested in SAR studies for their ability to reduce the secretion of proinflammatory cytokines. It was shown that the endocyclic enone is crucial for the bioactivity investigated and that the conjugated omega-side chain serves in a reinforcing manner.
A simple and effective procedure for conversion of primary, secondary, allylic and benzylic alcohols into the corresponding iodides is described using NaI/Amberlyst 15 in acetonitrile at room temperature. Selective conversion of benzylic alcohols in the presence of saturated alcohols into the corresponding benzylic iodides is achieved under these conditions.
Non-destructive Cleavage ofN-Acylsultams Under Neutral Conditions: Preparation of Enantiomerically, Pure Fmoc-Protected ?-Amino Acids
作者:Wolfgang Oppolzer、Phillippe Lienard
DOI:10.1002/hlca.19920750812
日期:1992.12.16
Heating diastereoisomerically pure N-acylsultams 3 or 4 with allyl alcohol/Ti(OR)4 efficiently yields sultams 1 or 2 and allyl esters 5. Esters 5 are hydrolyzed under nonbasic conditions in the presence of Wilkinson's catalyst to give enantiomerically and diastereoisomerically pure carboxylic acids 7. A series of [(fluoren-9-yl)methoxy]-carbonyl-(Fmoc)-protected amino acids 14 were thus prepared from
用烯丙醇/ Ti(OR)4加热非对映异构纯N-酰基磺酰胺3或4,可有效产生阿磺胺1或2和烯丙基酯5。在威尔金森氏催化剂的存在下,在非碱性条件下将酯5水解,得到对映异构和非对映异构纯的羧酸7。因此,由N- [ N '-(Fmoc)氨基]酰基苏丹酰胺12制备了一系列[[芴-9-基)甲氧基]-羰基-(Fmoc)-保护的氨基酸14。
A Simple, Efficient, and General Method for the Conversion of Alcohols into Alkyl Iodides by a CeCl<sub>3</sub>·7H<sub>2</sub>O/NaI System in Acetonitrile
作者:Milena Di Deo、Enrico Marcantoni、Elisabetta Torregiani、Giuseppe Bartoli、Maria Cristina Bellucci、Marcella Bosco、Letizia Sambri
DOI:10.1021/jo991894c
日期:2000.5.1
Bos, Wil; Pabon, Henk J. J., Recueil des Travaux Chimiques des Pays-Bas, 1980, vol. 99, # 4, p. 141 - 142
作者:Bos, Wil、Pabon, Henk J. J.
DOI:——
日期:——
KANAI, TAKAYA;IRIFUNE, SHINJI;ISHII, YASUTAKA;OGAWA, MASAYA, SYNTHESIS,(1989) N, C. 283-286