摘要:

AbstractNew evidence is presented which shows that the yellow pigment from the fungusMollisia caesia, mollisin, formerly believed to be 8‐acetonyl‐2,3‐dichloro‐5‐hydroxy‐7‐(or 6)methyl‐naphthoquinone‐1,4 is in fact 8‐dichloro‐acetyl‐5‐hydroxy‐2,7

ISSN:0165-0513    

DOI:10.1002/recl.19640831002

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractA survey is given of the synthetic experiments which have led finally to the synthesis of 8‐acetyl‐5‐methoxy‐2,7‐dimethylnaphthoquinone‐1,4. The synthetic compound proved to be identical with dechloromollisin methyl ether.Additional evidence is presented for the structure of the compound,leuco‐anhydrodec

ISSN:0165-0513    

DOI:10.1002/recl.19640831003

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

Abstract4‐Methoxy‐6‐methylhemimellitic acid and its isomers, 3‐methoxy‐5‐methyltrimellitic and 5‐methoxy‐3‐methyltrimellitic acid have been synthesized. 4‐Methoxy‐6‐methylhemimellitic acid is identical with a degradation product of mollisin methyl ether. Evidence is presented from which it must be concluded that cochenillic acid ‐ a degradation product of the well‐known insect pigments carminic and kermesic acids ‐ considered since 1897 to be 4‐hydroxy‐6‐methylhemimellitic acid is in fact 5‐hydroxy‐3‐methyltrimellitic acid. From this it follows that the current structural formulae of ca

ISSN:0165-0513    

DOI:10.1002/recl.19640831004

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19640831005

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractAddition of an organic isocyanate to hydroxy‐esters or amino‐esters results in attachment of the active H of the OH or NH2group to the N atom of the isocyanate, the rest of the adding molecule being linked to the C atom of the N = C bond. Though stable in themselves, the resulting products undergo cyclisation in inert media under the catalytic influence of sodium, or in some cases, by simply heating without any medium. The final ring compounds obtained in this way are oxazolidinediones, hydantoins, oxazines, uracils and quinazolidinediones starting with α‐hydroxy‐esters, α‐amino‐esters,ortho‐hydroxybenzoates, β‐amino‐esters, andortho‐aminobenzoates, respectively, as the original addition partners. β‐Hydroxy‐esters with a free H in the α‐position give unsaturated ami

ISSN:0165-0513    

DOI:10.1002/recl.19640831006

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractInterest in the antibacterial drug, 5‐nitrofurfural semicarbazone has led to the synthesis of a number of heterocyclic systems in which ring‐closure has been carried out on the semicarbazone (or similar) struct

ISSN:0165-0513    

DOI:10.1002/recl.19640831007

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractThe reaction of 4‐[(5′‐chloro‐3′,6′‐dimethyl‐2′‐benzofuranyl)methylene]‐2‐phenyloxazolin‐5‐one with hydrazine hydrate gives α‐benzamido‐β‐(5‐chloro‐3,6‐dimethyl‐2‐benzofuryl)acrylohydrazide which is converted to the corresponding azide by nitrous acid. On heating in benzene, the azide yields 4‐[(5′‐chloro‐3′,6′‐dimethyl‐2′‐benzofuranyl)methyl]‐2H‐6‐phenyl‐1,3,5‐oxadiazin‐2‐one

ISSN:0165-0513    

DOI:10.1002/recl.19640831008

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractDie Synthesen einiger einfach gebauter substituierter Cystinylamide werden beschrieben. Die durch diese Substanzen verursachte Hemmung des Abbaues von L‐Cystin‐di‐β‐naphthylamid und von Oxytocin durch die Oxytocinase des Schwangerenserums wird bestimmt und di

ISSN:0165-0513    

DOI:10.1002/recl.19640831009

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractA description is given of a synthesis of 9β‐progesterone (X) and 9β‐testosterone (XVII) with 9β‐ergosterol (I) as the starting

ISSN:0165-0513    

DOI:10.1002/recl.19640831010

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractDegradation of the plant amino acid (‐)‐mimosine yielded optically pure (+)‐α,β‐diaminopropionic acid hydrobromide identical with the acid obtained from L‐asparagine. (‐)‐Mimosine therefore belongs t

ISSN:0165-0513    

DOI:10.1002/recl.19640831011

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY