摘要:

Continued investigation into the natural products chemistry of the tropical marine spongeAgelas oroides, collected from the Great Barrier Reef, Queensland, Australia, has yielded two new naturally occurring pyrrole derivatives,1and2. The structures of1and2were determined from the interpretation of their 1D and 2D NMR, UV, IR and mass spectral data.

ISSN:1057-5634    

DOI:10.1080/10575639408044048

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A new norditerpenoid alkaloid, 16ß-acetoxycardiopetaline (2), and two known alkaloids, neoline (1) and senbusine A (3), were isolated for the first time from the seeds of Aconitum napellus ssp. vulgare. The structure of alkaloid 2 was established on the basis of ir, mass,1H-nmr,13C-nmr, DEPT and 2D-nmr spectrometry.

ISSN:1057-5634    

DOI:10.1080/10575639408044049

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The chiral intermediates (+)-11and (+)-12, are synthetized by using the diastereoselective three-center Michael addition of the chiral β-ketoester4to crotonaldehyde5allowing a new efficient entry into the synthesis of the Prelog-Djerassi lactone and related compounds.

ISSN:1057-5634    

DOI:10.1080/10575639408044050

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Synthesis of enantiomers of methyl 3-methyloctanoate2was achieved starting from enantiomers of methyl 3-hydroxy-2-methylpropanoate3in 9 steps. (S)-Enantiomer was shown to be identical with the naturally occurring isomer by GC analysis using a capillary column with chiral stationary phase. Interestingly, unnatural (R)-enantiomer has stronger floral note than natural (S)-enantiomer.

ISSN:1057-5634    

DOI:10.1080/10575639408044051

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1057-5634    

DOI:10.1080/10575639408044037

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor