FUSED PYRIMIDINES Part I: QUINAZOLINES Tbis is rbc twen~+rtb wiume (Part r) in tbs Icricr THE CHEMISTRY HETEROCYCLIC COMPOUNDS OF THE CHEMISTRY OF HETEROCYCLIC COMPOUNDS A MONOGRAPHS SERIES OF ARNOLD WEISSBERGER, Editor FUSED PYRIMIDINES E&ed by J. Brown I). Part I QUINAZOLINES Armarego W. L. F. Deparfment o f Medcal Cbemis/ry, Tbs John Curiin School of Medcal Reiearch, The Ausiralian National University, Canberra With collaboration in part by GEORGHE. HITCHINGaSn d GERTRUDBE. ELION WeLhome Researcb Labwatoritv, TrrcRaba, N.Y . 1967 INTERSCIENCE PUBLISHERS a division John Wiley & of Sons - - New York Sydney London First publiehed 1967 by John Wiley & Sons, Ltd. All Righta Reserved Library of Congress Catalog Card Number 67-27306 WILLzdyI DLOWEB AND SONS, LIICITW, WNDON ABD BECCLEB The Chemistry of Heterocyclic Compounds The Chemistry of heterocyclic one of the most compounds ia complex branches of organic chemistry, It is equally intereating for its theoretical implications, for the diversity of its synthetic procedures, and for the physiological and industrial significance of hetermyclic compounh. A field of such importance and inthic di6culty should be made as readily accessible rn possible, and the lack of a modern detsiled and comprehensive presentation of heterocyolic chemistry is therefore felt. It is the intention of the present series to fill this gap by keenly expert presentations of the varioua branchea of heterocyclic chemistry, The subdivieions have designed to cover the field in its entirety by been monographs which reflect the importance and the interrelations of the various compounds and accommodate the specific intereats of the authors. ARNOLDW EISSSEEWER Research Labord~es Eaatnaan H&k Cmpany Rochter, New Ymk V Foreword to Fused Pyrimidines The OriginalXy it W ~ Sin tended to present aJ1 the fused pyrimidine systems in one volume of series. Resurgence of interest in purines this and quinazoolines, the development of pteridine chemistry, and the wide exploration of & great many new fused eyetame mbracing the pyrimid- ine have made the task impossible. ring, fwed pyrimidines will now be covered in four parts, of whioh The Dr. Armarego’s &uinazolines is the firat. Others, dealing with Purim, Pteridiw, and Mkwklanew Fwed Pyrimidines respectively, in are active preparation. Eventually, this braoket of volumes bring to will the WI%S the expertise of six enthusiastict authors with wide and diverse exprience in the field. It is a privilege to assist Dr. Weissberger and the authors in organizing this projeat and in a memure of uniformity maintaining and balance in its parts. D. J. BROWN Vii Preface The presence of the benzene ring in quinazoline modifiea the chemistry of the pyrimidine ring in a number of ways. The modifies- tions are so diverse that description of the chemistry of quinazolines a merits monograph. Quinazolines were originally prepared for a separate academic interest, and a considerable variety were made because many synthetic approaches were possible. In the last two decades several naturally occurring quinazolines were discovered, and many quinazo- were synthesized for biologicd testing. The antimalarid activity lines of the alkaloid febrifugine, for example, led to the preparation of a large number of different quinazoline derivatives. The neurotoxic activity the recently discovered tetrodotoxin, a perhydroiminoquinazoline, of will undoubtedly stimulate research in this previously unknown claas of quinazolines. monograph is intended a, critical review of quinazoline This aa chemistry well a compilation of the melting pointa of quinazolines. &B as Condensed quinazolines are excluded, with the exception of the thiazolo- quinazolines (thiopegenes) because the chemistry of these is closely related to that of the thioquinazolines. The literature is covered com- pletely from the preparation of the first quinrtzoline in 1869 to the middle of 1966, and incompletely until mid-1966, I am grateful the many people who helped me during the to months of writing. Drs. G. H. Hitchings and G. B. Elion loaned me a preliminary account of the chemistry of quinazolines based essentially on synthetic methods. D. J. Brown has unselfishly guided and Dr. inspired me, particularly through the most difficult eections, and to him I owe a great debt of gratitude. Professor Adrien Albert carefully read several chapters and made constructive criticisms. The following were of considerable help in discussions, in making available to me information prior to publication, and in allowing me reproduce some of their to published dab: Professors R. D. Brown, A. R. Krttritzky, K. S. Nwang, Drs. 0.B . Barlin, T. J. Batterham, M. E. C. Biffin, J. W. Bunting, Gordon Catterall, L. Heffemn, D. D. Perrin, K. RaHmn, M. N. J. I. C. Smith, Mr. H. Yamamoto. My wife (who is also organic and an ix 1* Profme X chemist) assisted in making the tables, compiling the index, and in reading the whole manuscript. Finally, thanks are due to grateful Miss P. who canied out the tedious task of typing the manuscript Cope and to Mre. D. McLeod for library facilities. W. F. L. ARMAREQO The Austpdian National University, Canberra June 1966 Contents I. Introdmtion ,. 1.History . Nomenclature 2. . 3. Charaoter of Quinazolines. The Dual . 4. General Summary of Quinazoline Chemistry . A. Syntheses . a. F’rimary Synthesea b. Secondary Syntheses . . B. The Heightened Reactivity of 2- and 4-Alkyl Croups C. Addition and Substitution Reactions, and Nucleophilic Meta- . the& 6 D. N-Oxides , 7 . E. Tautomerism . 7 Oxidation Reduction F. and . 8 G. Rearrtangementa 8 IX. Biol.o gical Activity in QuinazoIines 9 Tables 9 6. . 6. References 10 . Qubaeoline II. . 11 $ynthesis of Quinazoline 1. . 11 2. Physical Properties . 13 A. Theoretical Aspects . 14 Spectra B. . 14 a. Ultraviolet Spectra . 14 b. Phosphorescence Spectra . 15 c. Infrared Spectra . 15 d. Proton Magnetic Resonance Spectre . 10 e. MMS Spectra . 18 C. Covalent Hydration 19 a, Covalent Hydration in Quinazoline. . 19 Effect of Substituents in the Pyrimidine on Covalent b. Ring Hydration . 27 . (i) Effect of substituents in position 4 27 . (ii) Effect of aubstituenta in position 2 28 xi xii Contents c. Effeot Substituenta in the on Covalent of . Benzene Ring Hydration 29 D. Pohrography , 32 . . 3. Chemical Reactivity of Quinazoline 33 . A. Hydrolysie, Oxidstion, Reduction 33 and . B. Electrophilic end Nucleophilic Substitution, and Alkylation 34 . C. Addition Reactions 35 . 4. References 36 . III. C-Alkyl- and C-Arylquhzo. bes 39 Methods Preparation 39 1. of . A. Bischler’s Synthesie 39 B. Oxidation of 3,4-Dihydroquinazolis , 41 C. Decarboxylation of Acids , 42 . D. N’ToIuene-psulphonyly~razinoD erivatives 42 From . E. From Imidoyl Chlorides and Nitriles . 42 F. Aryl Diazonium Salk and Nitriles 43 From G. From 4-chloro 4-~anoquinazolineasn d Grignard Reagente 44 or H. From Chloro- CyanoqUinazolines and Sub&mcee with sn or . Active Methylene Gro. up 46 I. Reidel’s Synthesis 48 . J. Miscellane.o us 48 2. Properties 49 . A. ahysiceJ Properties 49 . B. Chemical Properties 60 a. The Heightened Reactivity of. 2- end 4-Methyl Groups . 50 b. Oxidation and Reduction 54 . c. Eleotrophilic Substitution. 56 . d. Alkylation 66 e. Reactivity the Substituted Atoms Attached of Carbon fo. %. I,m d cw . 58 3. Tables 60 4. References . . 67 OxoquinosoJines 5-, 6-, 7-, and 8-Hydmxyquixutzolines . IV. and 69 1. 2-0x0quinaz01ines. . 69 A. Prepwation . . 69 B. Properties . . 72 . 2. 3,4- and 1,4-Dihydro-4-oxoquinasolines . 74 A. Preparation of 3,4-Dihydro-4-ox.o quinszolinea . . 74 a. Niementowski’s Synthesis . 74 b. Cyclization of o-Amidobenza.m ides . 78 c. From o-Aminobenzonitriles . 80 d. From Anthranilic Acid Derivatives and Nitriles .. 81 e. From 3,1,4-Benzoxazones (Acyhthranile) and Aminee 83 . . f. From Isatoic Anhydrides 87 . g. From Anthranilic Acids and Imidoyl ChIorides 88 or Esters . . h. From Anthranilic Acids Estere and Imidetes 91 i. Grimmel, Cuenther, and or Synthesis . . 93 Morg.a n’s . j. Sen and Ray’s Synthwis 94