ethauol, :iiid 100 nil of THF was stirred overilight a i 1'ootil temperature and filtered. The filt,rate was cwnceiitraterl I O :I hrowri gum which was dissolved in 40 ml of 1 : I k;tOIT--Et2(). The so1ut)ion was decolorized with Nuchar, coriceniriitrtl tll ;i >mall volume, diluted with EtOAr-heptalie, ailti stored a t 0'. The separated solid was collected aiid triturated with ; i c ~ t ~ ~ r c giving 3.3 g (555:) of 15. In a later preparatioii the gunmi>- reactiuti pI'(Jdll('i was i riturated with acetone to give comparable product i l l i:270 100-1 10 dec 100-110 dec 240-244 dec 207-209
Calcd, (%---11 x
Found, % 11 N
7 -
c
S
CsHi2S403 CsH,,N402S CBHnNjO2
45.27 5.67 26.40 42.09 5.30 24.34 14.0.5 45.49 6.20 33.16
45.16 41.92
C8H8NaO3 C8HSINpO2S
49.23 4.65 45.48 4.29
48.96 4 . 7 3 21.80 4.5.91 4.24 19.85
5.95 5.30 4 j . 5 0 6.12
21.53 19.89 13.18
S
26.30 24.76 33.32
14.16
14.89
TABLE I1 OH
Yield, No.
R
R'
%
VIb
OH
CZHj
18.j
VId
SH STI
C2Hj TI
31.0 44.4 34.0
NO.
R
R'
%
TIC
OH OH SH SH
CZHj H C2Hh
35.0 62.5 22.4 42 . 0
or3 H
7
Mp,
oc
>270 >270 >270 >270
Yield,
I'Ie
H
hlp,
Formula
C~~HPON~OL CiiH16N40j.H20 C1iH,oN404S ClaHisN404S.H~O
oc
126-129 190-195 170-172 170-li5
Experimental Section*
C
36.6.5 51.42 34.24 49.17
Calcd, H
3.59 5.17 5.36 4.95
7
pi
C
C B ~ H ~ ~ N E O B . H ~ O53.82 CmHzrNrOn.H20 50.10 CnkHjlNiOk 54.02 C~~H~SX~O~S.H ~O 48.48
8.52 8.73
56.21 51.16 54.33 48.iO
%-
------Calcd, Formula
C
15.54 15.99 14.88 15.29
H
6.21 5.25 5.86 5.09
Found, % H N
,
S
N 13.08 14.61 13.13 14.14
5.79 j.63 5.45 5.00
-Found, C
53.86 49.70 64.12 48.24
S
15.38 16.05 15.01 15.46
8.55 8.86
%------H
N
6.12 4.78 5.90 5.14
13.11 14.61 12.92 14.08
and the solid was recrystallized from EtOAc to give 3.5 g (59yo) VII, mp 135-137'. Ethyl 3-(2,4-Dihydroxy-6-methyl-5-pyrimidyl)propionate Anal. Calcd for C & I ~ N ~ O C, ~ : 53.92; H, 6.41; Tu', 15.72. (IIa). Procedure A.-To a stirred solution of ethyl 3-(2-aminoFound: C, 54.20; H, 6.27; N, 15.88. 4-hydroxy-6-methyl-5-pyrimid~l)propionateQ (4.5 g, 0.02 mole) Ethyl 3-(2-Mercapto-4-hydroxy-6-methyl-5-pyrimidyl)proin 25% AcOH (50 ml) a t 25" was added X'aKOn (1.97 g, 0.03 pionate (IIb).-A solution of NaOCH3 (5.4 g, 0.10 mole), thiourea mole) and the clear solution was heated on a steam bath for 1 (7.6 g, 0.10 mole), and diethyl 2-acetoglutarate (23 g, 0.10 mole) hr. Overnight chilling gave 3.3 g (73%) of crude IIa, mp 201in EtOH (200 ml) was refluxed for 2 hr, cooled to 2 5 O , and poured 205'. Recrystallization from 9570 EtOH gave 2.7 g (60%) of a into HzO (500 ml). Neutralization with AcOH and recrystallizapale yellow solid, mp 204-205'. .~ tion of the product from EtOH-HzO gave 8.4 g (35Yo) of IIb, Anal. Calcd for~CloH14N,04: C, 53.09; H, 6.24; S , 12.39. mp 195-196". The infrared spectrum was as expected. Found: C, 53.14; H, 6.50: N. 12.62. Anal. Calcd for Cl0H14Y2O3S:C, 49.57; H, 5.82; N, 11.56; Procedure B.-To a stirred solution of 3-(2-amino-4-hydroxyS, 13.23. Found: C, 49.00; H, 6.02; N, 11.91; S, 13.52. 6-methyl-5-pyrimidy1)propionicacidg (6 g, 0.03 mole) in 40% Preparation of Hydrazides.-A solution of the substituted AcOH (100 ml) a t 25' was added NaNO:, (3.5 g, 0.05 mole) and ethvl propionate (0.024 mole) in 95% hydrazine (15 ml) and 95% the solution heated on a steam bath for 1 hr. Chilling gave 4 g (66.5%) of 3-(2,4dihydroxy-6-methyl-5-pyrimidyl)propionic EtOH (50 ml) was heated on a steam bath for 1 hr and cooled to 25", and the pH was adjusted to 8 zt 0.5 with AcOH and chilled acid, mp >270". Refluxing the compound in absolute ethanol to give the corresponding hydrazide. See Table I. Infrared in the presence of HzS04 gave the ester IIa as evidenced by mixspectra were as expected. ture melting point and superimposable infrared spectra. Preparation of Azides.-A solution of the hydrazide (8.5 Ethyl 3-(2-Acetamido-4-hydroxy-6-methyl-5-pyrimidyl)prommoles) in H,O (25 ml) and 6 AVHCI(3 ml) was added dropwise pionate (VII).-A solution of ethyl 3 4 2-amino-4-hydroxy-6to a solution of XaNO, (17 mmoles) in H2O at 0-5". The resultmethyl-5pyrimidyl)propionate ( 5 g, 0.022 mole) in AcnO (50 ing clear solution was left in the ice bath for 30 min after addition ml) was heated on a steam bath for 2 hr and evaporated in vucuo, was complete, and the light yellow solid which crystallized was dried a t 25" (vacuum) to give the azide. See Table I. Infrared spectra showed peaks a t 2140 and 2130 cm-1 for IVa and IVb, ( 8 ) Melting points were determined on t h e Thomas-Hoover capillary respectively. apparatus and a r e corrected. All infrared spectra were obtained from Nujol Reaction of T'III with nitrous acid as above gave 38y0 of a mulls on a Perkin-Elmer Infracord. Elemental analyses were conducted by product which decomposed a t 110-115°. However, attempted Weiler and Strauss, Alfred Bernhardt, and Galbraith microanalytical conversion to the isocyanate gave only polymeric materials. laboratories. All carhamates and ureas were heated a t looo under vacuum Decomposition in the presence of ethyl p-aminobenzoate in prior to analysis. (9) V. Rericha and M. Protiva, Chern. Listy, 44, 232 (1950). toluene or DXF failed to produce any recognizable products.
